nhaliday + environment   178

An adaptability limit to climate change due to heat stress
Despite the uncertainty in future climate-change impacts, it is often assumed that humans would be able to adapt to any possible warming. Here we argue that heat stress imposes a robust upper limit to such adaptation. Peak heat stress, quantified by the wet-bulb temperature TW, is surprisingly similar across diverse climates today. TW never exceeds 31 °C. Any exceedence of 35 °C for extended periods should induce hyperthermia in humans and other mammals, as dissipation of metabolic heat becomes impossible. While this never happens now, it would begin to occur with global-mean warming of about 7 °C, calling the habitability of some regions into question. With 11–12 °C warming, such regions would spread to encompass the majority of the human population as currently distributed. Eventual warmings of 12 °C are possible from fossil fuel burning. One implication is that recent estimates of the costs of unmitigated climate change are too low unless the range of possible warming can somehow be narrowed. Heat stress also may help explain trends in the mammalian fossil record.

Trajectories of the Earth System in the Anthropocene: http://www.pnas.org/content/early/2018/07/31/1810141115
We explore the risk that self-reinforcing feedbacks could push the Earth System toward a planetary threshold that, if crossed, could prevent stabilization of the climate at intermediate temperature rises and cause continued warming on a “Hothouse Earth” pathway even as human emissions are reduced. Crossing the threshold would lead to a much higher global average temperature than any interglacial in the past 1.2 million years and to sea levels significantly higher than at any time in the Holocene. We examine the evidence that such a threshold might exist and where it might be.
study  org:nat  environment  climate-change  humanity  existence  risk  futurism  estimate  physics  thermo  prediction  temperature  nature  walls  civilization  flexibility  rigidity  embodied  multi  manifolds  plots  equilibrium  phase-transition  oscillation  comparison  complex-systems  earth 
august 2018 by nhaliday
WHO | Priority environment and health risks
also: http://www.who.int/heli/risks/vectors/vector/en/

Environmental factors are a root cause of a significant disease burden, particularly in developing countries. An estimated 25% of death and disease globally, and nearly 35% in regions such as sub-Saharan Africa, is linked to environmental hazards. Some key areas of risk include the following:

- Unsafe water, poor sanitation and hygiene kill an estimated 1.7 million people annually, particularly as a result of diarrhoeal disease.
- Indoor smoke from solid fuels kills an estimated 1.6 million people annually due to respiratory diseases.
- Malaria kills over 1.2 million people annually, mostly African children under the age of five. Poorly designed irrigation and water systems, inadequate housing, poor waste disposal and water storage, deforestation and loss of biodiversity, all may be contributing factors to the most common vector-borne diseases including malaria, dengue and leishmaniasis.
- Urban air pollution generated by vehicles, industries and energy production kills approximately 800 000 people annually.
- Unintentional acute poisonings kill 355 000 people globally each year. In developing countries, where two-thirds of these deaths occur, such poisonings are associated strongly with excessive exposure to, and inappropriate use of, toxic chemicals and pesticides present in occupational and/or domestic environments.
- Climate change impacts including more extreme weather events, changed patterns of disease and effects on agricultural production, are estimated to cause over 150 000 deaths annually.

ed.:
Note the high point at human origin (Africa, Middle East) and Asia. Low points in New World and Europe/Russia. Probably key factor in explaining human psychological variation (Haidt axes, individualism-collectivism, kinship structure, etc.). E.g., compare Islam/Judaism (circumcision, food preparation/hygiene rules) and Christianity (orthodoxy more than orthopraxy, no arbitrary practices for group-marking).

I wonder if the dietary and hygiene laws of Christianity get up-regulated in higher parasite load places (the US South, Middle Eastern Christianity, etc.)?

Also the reason for this variation probably basically boils down how long local microbes have had time to adapt to the human immune system.

obv. correlation: https://pinboard.in/u:nhaliday/b:074ecdf30c50

Tropical disease: https://en.wikipedia.org/wiki/Tropical_disease
Tropical diseases are diseases that are prevalent in or unique to tropical and subtropical regions.[1] The diseases are less prevalent in temperate climates, due in part to the occurrence of a cold season, which controls the insect population by forcing hibernation. However, many were present in northern Europe and northern America in the 17th and 18th centuries before modern understanding of disease causation. The initial impetus for tropical medicine was to protect the health of colonialists, notably in India under the British Raj.[2] Insects such as mosquitoes and flies are by far the most common disease carrier, or vector. These insects may carry a parasite, bacterium or virus that is infectious to humans and animals. Most often disease is transmitted by an insect "bite", which causes transmission of the infectious agent through subcutaneous blood exchange. Vaccines are not available for most of the diseases listed here, and many do not have cures.

cf. Galton: https://pinboard.in/u:nhaliday/b:f72f8e03e729
org:gov  org:ngo  trivia  maps  data  visualization  pro-rata  demographics  death  disease  spreading  parasites-microbiome  world  developing-world  africa  MENA  asia  china  sinosphere  orient  europe  the-great-west-whale  occident  explanans  individualism-collectivism  n-factor  things  phalanges  roots  values  anthropology  cultural-dynamics  haidt  scitariat  morality  correlation  causation  migration  sapiens  history  antiquity  time  bio  EEA  eden-heaven  religion  christianity  islam  judaism  theos  ideology  database  list  tribalism  us-them  archaeology  environment  nature  climate-change  atmosphere  health  fluid  farmers-and-foragers  age-of-discovery  usa  the-south  speculation  questions  flexibility  epigenetics  diet  food  sanctity-degradation  multi  henrich  kinship  gnon  temperature  immune  investing  cost-benefit  tradeoffs 
july 2018 by nhaliday
Complexity no Bar to AI - Gwern.net
Critics of AI risk suggest diminishing returns to computing (formalized asymptotically) means AI will be weak; this argument relies on a large number of questionable premises and ignoring additional resources, constant factors, and nonlinear returns to small intelligence advantages, and is highly unlikely. (computer science, transhumanism, AI, R)
created: 1 June 2014; modified: 01 Feb 2018; status: finished; confidence: likely; importance: 10
ratty  gwern  analysis  faq  ai  risk  speedometer  intelligence  futurism  cs  computation  complexity  tcs  linear-algebra  nonlinearity  convexity-curvature  average-case  adversarial  article  time-complexity  singularity  iteration-recursion  magnitude  multiplicative  lower-bounds  no-go  performance  hardware  humanity  psychology  cog-psych  psychometrics  iq  distribution  moments  complement-substitute  hanson  ems  enhancement  parable  detail-architecture  universalism-particularism  neuro  ai-control  environment  climate-change  threat-modeling  security  theory-practice  hacker  academia  realness  crypto  rigorous-crypto  usa  government 
april 2018 by nhaliday
Harnessing Evolution - with Bret Weinstein | Virtual Futures Salon - YouTube
- ways to get out of Malthusian conditions: expansion to new frontiers, new technology, redistribution/theft
- some discussion of existential risk
- wants to change humanity's "purpose" to one that would be safe in the long run; important thing is it has to be ESS (maybe he wants a singleton?)
- not too impressed by transhumanism (wouldn't identify with a brain emulation)
video  interview  thiel  expert-experience  evolution  deep-materialism  new-religion  sapiens  cultural-dynamics  anthropology  evopsych  sociality  ecology  flexibility  biodet  behavioral-gen  self-interest  interests  moloch  arms  competition  coordination  cooperate-defect  frontier  expansionism  technology  efficiency  thinking  redistribution  open-closed  zero-positive-sum  peace-violence  war  dominant-minority  hypocrisy  dignity  sanctity-degradation  futurism  environment  climate-change  time-preference  long-short-run  population  scale  earth  hidden-motives  game-theory  GT-101  free-riding  innovation  leviathan  malthus  network-structure  risk  existence  civil-liberty  authoritarianism  tribalism  us-them  identity-politics  externalities  unintended-consequences  internet  social  media  pessimism  universalism-particularism  energy-resources  biophysical-econ  politics  coalitions  incentives  attention  epistemic  biases  blowhards  teaching  education  emotion  impetus  comedy  expression-survival  economics  farmers-and-foragers  ca 
april 2018 by nhaliday
Existential Risks: Analyzing Human Extinction Scenarios
https://twitter.com/robinhanson/status/981291048965087232
https://archive.is/dUTD5
Would you endorse choosing policy to max the expected duration of civilization, at least as a good first approximation?
Can anyone suggest a different first approximation that would get more votes?

https://twitter.com/robinhanson/status/981335898502545408
https://archive.is/RpygO
How useful would it be to agree on a relatively-simple first-approximation observable-after-the-fact metric for what we want from the future universe, such as total life years experienced, or civilization duration?

We're Underestimating the Risk of Human Extinction: https://www.theatlantic.com/technology/archive/2012/03/were-underestimating-the-risk-of-human-extinction/253821/
An Oxford philosopher argues that we are not adequately accounting for technology's risks—but his solution to the problem is not for Luddites.

Anderson: You have argued that we underrate existential risks because of a particular kind of bias called observation selection effect. Can you explain a bit more about that?

Bostrom: The idea of an observation selection effect is maybe best explained by first considering the simpler concept of a selection effect. Let's say you're trying to estimate how large the largest fish in a given pond is, and you use a net to catch a hundred fish and the biggest fish you find is three inches long. You might be tempted to infer that the biggest fish in this pond is not much bigger than three inches, because you've caught a hundred of them and none of them are bigger than three inches. But if it turns out that your net could only catch fish up to a certain length, then the measuring instrument that you used would introduce a selection effect: it would only select from a subset of the domain you were trying to sample.

Now that's a kind of standard fact of statistics, and there are methods for trying to correct for it and you obviously have to take that into account when considering the fish distribution in your pond. An observation selection effect is a selection effect introduced not by limitations in our measurement instrument, but rather by the fact that all observations require the existence of an observer. This becomes important, for instance, in evolutionary biology. For instance, we know that intelligent life evolved on Earth. Naively, one might think that this piece of evidence suggests that life is likely to evolve on most Earth-like planets. But that would be to overlook an observation selection effect. For no matter how small the proportion of all Earth-like planets that evolve intelligent life, we will find ourselves on a planet that did. Our data point-that intelligent life arose on our planet-is predicted equally well by the hypothesis that intelligent life is very improbable even on Earth-like planets as by the hypothesis that intelligent life is highly probable on Earth-like planets. When it comes to human extinction and existential risk, there are certain controversial ways that observation selection effects might be relevant.
bostrom  ratty  miri-cfar  skunkworks  philosophy  org:junk  list  top-n  frontier  speedometer  risk  futurism  local-global  scale  death  nihil  technology  simulation  anthropic  nuclear  deterrence  environment  climate-change  arms  competition  ai  ai-control  genetics  genomics  biotech  parasites-microbiome  disease  offense-defense  physics  tails  network-structure  epidemiology  space  geoengineering  dysgenics  ems  authoritarianism  government  values  formal-values  moloch  enhancement  property-rights  coordination  cooperate-defect  flux-stasis  ideas  prediction  speculation  humanity  singularity  existence  cybernetics  study  article  letters  eden-heaven  gedanken  multi  twitter  social  discussion  backup  hanson  metrics  optimization  time  long-short-run  janus  telos-atelos  poll  forms-instances  threat-modeling  selection  interview  expert-experience  malthus  volo-avolo  intel  leviathan  drugs  pharma  data  estimate  nature  longevity  expansionism  homo-hetero  utopia-dystopia 
march 2018 by nhaliday
Plague of Frogs | West Hunter
For a few years the herpetologists were concerned yet happy. Concerned, because many frog populations were crashing and some were going extinct. Happy, because confused puppies in Washington were giving them money, something that hardly ever happens to frogmen. The theory was that amphibians were ‘canaries in a coal mine’, uniquely sensitive to environmental degradation.

...

It took some time for herpetologists to admit that this chytrid fungus is the main culprit – some are still resisting. First, it was a lot like how doctors resisted Semmelweiss’ discoveries about the cause of puerperal fever – since doctors were the main method of transmission. How did this fungus get to the cloud forests of Costa Rica? On the boots of herpetologists, of course.

The second problem is Occam’s butterknife: even though this chytrid fungus is the main culprit, it’s just got to be more complicated than that. Even if it isn’t. People in the life sciences – biology and medicine – routinely reject simple hypotheses that do a good job of explaining the data for more complex hypotheses that don’t. College taught them to think – unwisely.
west-hunter  scitariat  reflection  stories  troll  lol  science  low-hanging  occam  parsimony  bio  medicine  meta:medicine  ability-competence  explanans  disease  parasites-microbiome  spreading  world  nature  environment  climate-change  hypochondria  academia  questions  epidemiology  incentives  interests 
february 2018 by nhaliday
Which Countries Create the Most Ocean Trash? - WSJ
China and Indonesia Are Top Sources of Plastic Garbage Reaching Oceans, Researchers Say
news  org:rec  china  asia  developing-world  environment  oceans  attaq  trivia  cocktail  data  visualization  maps  world  scale  top-n  ranking 
january 2018 by nhaliday
The Science of Roman History: Biology, Climate, and the Future of the Past (Hardcover and eBook) | Princeton University Press
Forthcoming April 2018

How the latest cutting-edge science offers a fuller picture of life in Rome and antiquity
This groundbreaking book provides the first comprehensive look at how the latest advances in the sciences are transforming our understanding of ancient Roman history. Walter Scheidel brings together leading historians, anthropologists, and geneticists at the cutting edge of their fields, who explore novel types of evidence that enable us to reconstruct the realities of life in the Roman world.

Contributors discuss climate change and its impact on Roman history, and then cover botanical and animal remains, which cast new light on agricultural and dietary practices. They exploit the rich record of human skeletal material--both bones and teeth—which forms a bio-archive that has preserved vital information about health, nutritional status, diet, disease, working conditions, and migration. Complementing this discussion is an in-depth analysis of trends in human body height, a marker of general well-being. This book also assesses the contribution of genetics to our understanding of the past, demonstrating how ancient DNA is used to track infectious diseases, migration, and the spread of livestock and crops, while the DNA of modern populations helps us reconstruct ancient migrations, especially colonization.

Opening a path toward a genuine biohistory of Rome and the wider ancient world, The Science of RomanHistory offers an accessible introduction to the scientific methods being used in this exciting new area of research, as well as an up-to-date survey of recent findings and a tantalizing glimpse of what the future holds.

Walter Scheidel is the Dickason Professor in the Humanities, Professor of Classics and History, and a Kennedy-Grossman Fellow in Human Biology at Stanford University. He is the author or editor of seventeen previous books, including The Great Leveler: Violence and the History of Inequality from the Stone Age to the Twenty-First Century (Princeton).
books  draft  todo  broad-econ  economics  anthropology  genetics  genomics  aDNA  measurement  volo-avolo  environment  climate-change  archaeology  history  iron-age  mediterranean  the-classics  demographics  health  embodied  labor  migration  walter-scheidel  agriculture  frontier  malthus  letters  gibbon  traces 
november 2017 by nhaliday
Climate Risk, Cooperation, and the Co-Evolution of Culture and Institutions∗
We test this hypothesis for Europe combining high-resolution climate data for the period 1500-2000 with survey data at the sub-national level. We find that regions with higher inter-annual variability in precipitation and temperature display higher levels of trust. This effect is driven by variability in the growing season months, and by historical rather than recent variability. Regarding possible mechanisms, we show that regions with more variable climate were more closely connected to the Medieval trade network, indicating a higher propensity to engage in inter-community exchange. We also find that these regions were more likely to adopt participatory political institutions earlier on, and are characterized by a higher quality of local governments still today. Our results suggest that, by favoring the emergence of mutually-reinforcing norms and institutions, exposure to environmental risk had a long-lasting impact on human cooperation.
pdf  study  broad-econ  economics  cliometrics  path-dependence  growth-econ  political-econ  institutions  government  social-norms  culture  cultural-dynamics  correlation  history  early-modern  mostly-modern  values  poll  trust  n-factor  cooperate-defect  cohesion  democracy  environment  europe  the-great-west-whale  geography  trade  network-structure  general-survey  outcome-risk  uncertainty  branches  microfoundations  hari-seldon 
november 2017 by nhaliday
Plastic fibres found in tap water around the world, study reveals | Environment | The Guardian
Scores of tap water samples from more than a dozen nations were analysed by scientists for an investigation by Orb Media, who shared the findings with the Guardian. Overall, 83% of the samples were contaminated with plastic fibres.

We are living on a plastic planet. What does it mean for our health?
New studies reveal that tiny plastic fibres are everywhere, not just in our oceans but on land too. Now we urgently need to find out how they enter our food, air and tap water and what the effects are on all of us

The US had the highest contamination rate, at 94%, with plastic fibres found in tap water sampled at sites including Congress buildings, the US Environmental Protection Agency’s headquarters, and Trump Tower in New York. Lebanon and India had the next highest rates.

...

Current standard water treatment systems do not filter out all of the microplastics, Mahon said: “There is nowhere really where you can say these are being trapped 100%. In terms of fibres, the diameter is 10 microns across and it would be very unusual to find that level of filtration in our drinking water systems.”

Bottled water may not provide a microplastic-free alternative to tapwater, as the they were also found in a few samples of commercial bottled water tested in the US for Orb.

Sea salt around the world is contaminated by plastic, studies show: https://www.theguardian.com/environment/2017/sep/08/sea-salt-around-world-contaminated-by-plastic-studies
news  org:lite  org:anglo  data  hypochondria  fluid  embodied  endocrine  environment  public-health  multi  food  science-anxiety 
september 2017 by nhaliday
Does Polarization Imply Poor Representation? A New Perspective on the “Disconnect” Between Politicians and Voters*
Broockman-Ahler 2015

immigration positions under B.2: http://www.dougahler.com/uploads/2/4/6/9/24697799/ahler_broockman_ideological_innocence.pdf#page=42
distribution: http://www.dougahler.com/uploads/2/4/6/9/24697799/ahler_broockman_ideological_innocence.pdf#page=53

https://twitter.com/tcjfs/status/904024125030756356
https://archive.is/BrnpJ
38% support immediate mass deportation of all illegals (Broockman 2015). This view has zero representation in either house of congress.

Do you understand the GOP play here by the way? I'm genuinely puzzled. Is it a moral conviction? Because it can't be a vote play.
In my view it's a mix of mindless sentimentality, the donor class, and existing in an hermetically sealed ideological bubble.

https://twitter.com/tcjfs/status/951989543653265408
https://archive.is/ya2sz
cheap labor lobby, public choice (votes), & subversive elites gripped by multiculti zealotry

https://twitter.com/tcjfs/status/911291455762845696
https://archive.is/dw6OO
In a 2014 radio interview, Paul Ryan was asked if "immigrants from the 3rd world are more or less likely to support conservative policies":
pdf  study  sociology  polisci  politics  poll  values  coalitions  ideology  polarization  usa  2016-election  trump  government  🎩  policy  wonkish  drugs  energy-resources  environment  climate-change  redistribution  welfare-state  arms  law  regulation  healthcare  migration  taxes  gender  sex  sexuality  education  chart  multi  distribution  crosstab  twitter  social  discussion  gnon  unaffiliated  right-wing  strategy  backup  elite  vampire-squid  roots  speculation  impetus  interview  quotes  commentary  people  track-record  reason  labor  business  capital  social-choice  rent-seeking  rot  culture  unintended-consequences  signaling  religion  theos  christianity  media  propaganda  patho-altruism  self-interest  diversity  culture-war  kumbaya-kult  identity-politics  westminster 
september 2017 by nhaliday
Hurricane Harvey: The Devastation and What Comes Next - The New York Times
https://www.wsj.com/articles/arkema-report-said-chemical-could-put-one-million-at-risk-1504215571
A chemical stored at a Houston plant that caught fire early Thursday morning presents an airborne danger to more than 1 million people if released in a worst-case scenario, according to a company risk management plan filed to the federal government.
http://www.latimes.com/nation/la-na-harvey-engineering-20170828-story.html
http://www.newyorker.com/news/news-desk/why-does-america-need-the-cajun-navy
https://twitter.com/_TamaraWinter/status/903613511082921984
I think this (generally nice) story about the Cajun Navy + groups like it misunderstands civil society in a big way.
How quickly can we adapt to change? An assessment of hurricane damage mitigation efforts using forecast uncertainty: https://www.economics.ox.ac.uk/materials/papers/15156/831-martinez.pdf
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september 2017 by nhaliday
Lecture 3: Global Energy Cycle
solar flux, albedo, greenhouse effect, energy balance, vertical distribution of energy, tilt and seasons
pdf  slides  nibble  physics  electromag  space  earth  sky  atmosphere  environment  temperature  stock-flow  data  magnitude  scale  phys-energy  distribution  oscillation  cycles  lectures  geography 
august 2017 by nhaliday
Muscle, steam and combustion
Vaclav Smil’s Energy and Civilization is a monumental history of how humanity has harnessed muscle, steam and combustion to build palaces and skyscrapers, light the night and land on the Moon. Want to learn about the number of labourers needed to build Egypt’s pyramids of Giza, or US inventor Thomas Edison’s battles with Nikola Tesla and George Westinghouse to electrify homes and cities, or the upscaling of power stations and blast furnaces in the twentieth century? Look no further.
pdf  books  review  vaclav-smil  pseudoE  deep-materialism  energy-resources  biophysical-econ  the-world-is-just-atoms  big-picture  history  antiquity  iron-age  medieval  early-modern  farmers-and-foragers  civilization  technology  industrial-revolution  heavy-industry  🔬  phys-energy  the-bones  environment  scale  economics  growth-econ  broad-econ  efficiency  chart  dirty-hands  fluid  input-output 
august 2017 by nhaliday
The Gulf Stream Myth
1. Fifty percent of the winter temperature difference across the North Atlantic is caused by the eastward atmospheric transport of heat released by the ocean that was absorbed and stored in the summer.
2. Fifty percent is caused by the stationary waves of the atmospheric flow.
3. The ocean heat transport contributes a small warming across the basin.

Is the Gulf Stream responsible for Europe’s mild winters?: http://ocp.ldeo.columbia.edu/res/div/ocp/gs/pubs/Seager_etal_QJ_2002.pdf
org:junk  environment  temperature  climate-change  usa  europe  comparison  hmm  regularizer  trivia  cocktail  error  oceans  chart  atmosphere  multi  pdf  study  earth  geography 
august 2017 by nhaliday
Polygenic Adaptation has Impacted Multiple Anthropometric Traits | bioRxiv
By comparing these polygenic scores to a null distribution under genetic drift, we identify strong signals of selection for a suite of anthropometric traits including height, infant head circumference (IHC), hip circumference (HIP) and waist-to-hip ratio (WHR), as well as type 2 diabetes (T2D). In addition to the known north-south gradient of polygenic height scores within Europe, we find that natural selection has contributed to a gradient of decreasing polygenic height scores from West to East across Eurasia, and that this gradient is consistent with selection on height in ancient populations who have contributed ancestry broadly across Eurasia. We find that the signal of selection on HIP can largely be explained as a correlated response to selection on height. However, our signals in IHC and WC/WHR cannot, suggesting a response to selection along multiple axes of body shape variation. Our observation that IHC, WC, and WHR polygenic scores follow a strong latitudinal cline in Western Eurasia support the role of natural selection in establishing Bergmann's Rule in humans, and are consistent with thermoregulatory adaptation in response to latitudinal temperature variation.

http://infoproc.blogspot.com/2017/07/natural-selection-and-body-shape-in.html
study  bio  preprint  biodet  genetics  evolution  sapiens  pop-diff  embodied  recent-selection  survey  🌞  europe  asia  shift  GWAS  population-genetics  pop-structure  spearhead  environment  temperature  correlation  multi  hsu  scitariat  commentary 
july 2017 by nhaliday
Economics empiricism - Wikipedia
Economics empiricism[1] (sometimes economic imperialism) in contemporary economics refers to economic analysis of seemingly non-economic aspects of life,[2] such as crime,[3] law,[4] the family,[5] prejudice,[6] tastes,[7] irrational behavior,[8] politics,[9] sociology,[10] culture,[11] religion,[12] war,[13] science,[14] and research.[14] Related usage of the term predates recent decades.[15]

The emergence of such analysis has been attributed to a method that, like that of the physical sciences, permits refutable implications[16] testable by standard statistical techniques.[17] Central to that approach are "[t]he combined postulates of maximizing behavior, stable preferences and market equilibrium, applied relentlessly and unflinchingly."[18] It has been asserted that these and a focus on economic efficiency have been ignored in other social sciences and "allowed economics to invade intellectual territory that was previously deemed to be outside the discipline’s realm."[17][19]

The Fluidity of Race: https://westhunt.wordpress.com/2015/01/26/the-fluidity-of-race/
So: what can we conclude about this paper? It’s a classic case of economic imperialism, informed by what ‘intellectuals’ [ those that have never been introduced to Punnet squares, Old Blue Light, the Dirac equation, or Melungeons] would like to hear.

It is wrong, not close to right.

Breadth-first search: https://westhunt.wordpress.com/2015/05/24/breadth-first-search/
When I complain about some egregious piece of research, particularly those that are in some sense cross-disciplinary, I often feel that that just knowing more would solve the problem. If Roland Fryer or Oded Galor understood genetics, they wouldn’t make these silly mistakes. If Qian and Nix understood genetics or American post-Civil War history, they would never have written that awful paper about massive passing. Or if paleoanthropologists and population geneticists had learned about mammalian hybrids, they would have been open to the idea of Neanderthal introgression.

But that really amounts to a demand that people learn about five times as much in college and grad school as they actually do. It’s not going to happen. Or, perhaps, find a systematic and effective way of collaborating with people outside their discipline without having their heads shaved. That doesn’t sound too likely either.

Hot enough for you?: https://westhunt.wordpress.com/2015/10/22/hot-enough-for-you/
There’s a new study out in Nature, claiming that economic productivity peaks at 13 degrees Centigrade and that global warming will therefore drastically decrease world GDP.

Singapore. Phoenix. Queensland. Air-conditioners!

Now that I’ve made my point, just how stupid are these people? Do they actually believe this shit? I keep seeing papers by economists – in prominent places – that rely heavily on not knowing jack shit about anything on Earth, papers that could only have been written by someone that didn’t know a damn thing about the subject they were addressing, from the influence of genetic diversity on civilization achievement (zilch) to the massive race-switching that happened after the Civil War (not). Let me tell you, there’s a difference between ‘economic imperialism’ and old-fashioned real imperialism: people like Clive of India or Raffles bothered to learn something about the territory they were conquering. They knew enough to run divide et impera in their sleep: while economists never say peccavi, no matter how badly they screw up.
economics  social-science  thinking  lens  things  conceptual-vocab  concept  academia  wiki  reference  sociology  multi  west-hunter  scitariat  rant  critique  race  usa  history  mostly-modern  methodology  conquest-empire  ideology  optimization  equilibrium  values  pseudoE  science  frontier  thick-thin  interdisciplinary  galor-like  broad-econ  info-dynamics  alt-inst  environment  climate-change  temperature  india  asia  britain  expansionism  diversity  knowledge  ability-competence  commentary  study  summary  org:nat 
july 2017 by nhaliday
Political Conservatives’ Affinity for Obedience to Authority Is Loyal, Not BlindPersonality and Social Psychology Bulletin - Jeremy A. Frimer, Danielle Gaucher, Nicola K. Schaefer, 2014
Sharp Partisan Divisions in Views of National Institutions: http://www.people-press.org/2017/07/10/sharp-partisan-divisions-in-views-of-national-institutions/
Americans’ Attitudes About the News Media Deeply Divided Along Partisan Lines: http://www.journalism.org/2017/05/10/americans-attitudes-about-the-news-media-deeply-divided-along-partisan-lines/

https://twitter.com/tcjfs/status/925509885848059904
https://archive.is/Q2x1T
I'm going through this survey... it just keeps getting better famalam

from the Cato study here: https://pinboard.in/u:nhaliday/b:75ca38a74b99

https://twitter.com/AngloRemnant/status/884984883512307712
https://archive.is/bEj6i
Near perfect symmetry between Rep/Dem positive opinion on Church/College, because, well..
Yes, it's amazing how well each of these hostile tribes recognize each other's religious institutions.
.. income & education are Inversely related to positive view of universities among right-leaning folks.
wew, means there's so much room to grow among the proles
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july 2017 by nhaliday
Defection – quas lacrimas peperere minoribus nostris!
https://quaslacrimas.wordpress.com/2017/06/28/discussion-of-defection/

Kindness Against The Grain: https://srconstantin.wordpress.com/2017/06/08/kindness-against-the-grain/
I’ve heard from a number of secular-ish sources (Carse, Girard, Arendt) that the essential contribution of Christianity to human thought is the concept of forgiveness. (Ribbonfarm also has a recent post on the topic of forgiveness.)

I have never been a Christian and haven’t even read all of the New Testament, so I’ll leave it to commenters to recommend Christian sources on the topic.

What I want to explore is the notion of kindness without a smooth incentive gradient.

The Social Module: https://bloodyshovel.wordpress.com/2015/10/09/the-social-module/
Now one could propose that the basic principle of human behavior is to raise the SP number. Sure there’s survival and reproduction. Most people would forget all their socialization if left hungry and thirsty for days in the jungle. But more often than not, survival and reproduction depend on being high status; having a good name among your peers is the best way to get food, housing and hot mates.

The way to raise one’s SP number depends on thousands of different factors. We could grab most of them and call them “culture”. In China having 20 teenage mistresses as an old man raises your SP; in Western polite society it is social death. In the West making a fuss about disobeying one’s parents raises your SP, everywhere else it lowers it a great deal. People know that; which is why bureaucrats in China go to great lengths to acquire a stash of young women (who they seldom have time to actually enjoy), while teenagers in the West go to great lengths to be annoying to their parents for no good reason.

...

It thus shouldn’t surprise us that something as completely absurd as Progressivism is the law of the land in most of the world today, even though it denies obvious reality. It is not the case that most people know that progressive points are all bogus, but obey because of fear or cowardice. No, an average human brain has much more neurons being used to scan the social climate and see how SP are allotted, than neurons being used to analyze patterns in reality to ascertain the truth. Surely your brain does care a great deal about truth in some very narrow areas of concern to you. Remember Conquest’s first law: Everybody is Conservative about what he knows best. You have to know the truth about what you do, if you are to do it effectively.

But you don’t really care about truth anywhere else. And why would you? It takes time and effort you can’t really spare, and it’s not really necessary. As long as you have some area of specialization where you can make a living, all the rest you must do to achieve survival and reproduction is to raise your SP so you don’t get killed and your guts sacrificed to the mountain spirits.

SP theory (I accept suggestions for a better name) can also explains the behavior of leftists. Many conservatives of a medium level of enlightenment point out the paradox that leftists historically have held completely different ideas. Leftism used to be about the livelihood of industrial workers, now they agitate about the environment, or feminism, or foreigners. Some people would say that’s just historical change, or pull a No True Scotsman about this or that group not being really leftists. But that’s transparent bullshit; very often we see a single person shifting from agitating about Communism and worker rights, to agitate about global warming or rape culture.

...

The leftist strategy could be defined as “psychopathic SP maximization”. Leftists attempt to destroy social equilibrium so that they can raise their SP number. If humans are, in a sense, programmed to constantly raise their status, well high status people by definition can’t raise it anymore (though they can squabble against each other for marginal gains), their best strategy is to freeze society in place so that they can enjoy their superiority. High status people by definition have power, and thus social hierarchy during human history tends to be quite stable.

This goes against the interests of many. First of all the lower status people, who, well, want to raise their status, but can’t manage to do so. And it also goes against the interests of the particularly annoying members of the upper class who want to raise their status on the margin. Conservative people can be defined as those who, no matter the absolute level, are in general happy with it. This doesn’t mean they don’t want higher status (by definition all humans do), but the output of other brain modules may conclude that attempts to raise SP might threaten one’s survival and reproduction; or just that the chances of raising one’s individual SP is hopeless, so one might as well stay put.

...

You can’t blame people for being logically inconsistent; because they can’t possibly know anything about all these issues. Few have any experience or knowledge about evolution and human races, or about the history of black people to make an informed judgment on HBD. Few have time to learn about sex differences, and stuff like the climate is as close to unknowable as there is. Opinions about anything but a very narrow area of expertise are always output of your SP module, not any judgment of fact. People don’t know the facts. And even when they know; I mean most people have enough experience with sex differences and black dysfunction to be quite confident that progressive ideas are false. But you can never be sure. As Hume said, the laws of physics are a judgment of habit; who is to say that a genie isn’t going to change all you know the next morning? At any rate, you’re always better off toeing the line, following the conventional wisdom, and keeping your dear SP. Perhaps you can even raise them a bit. And that is very nice. It is niceness itself.

Leftism is just an easy excuse: https://bloodyshovel.wordpress.com/2015/03/01/leftism-is-just-an-easy-excuse/
Unless you’re not the only defector. You need a way to signal your intention to defect, so that other disloyal fucks such as yourself (and they’re bound to be others) can join up, thus reducing the likely costs of defection. The way to signal your intention to defect is to come up with a good excuse. A good excuse to be disloyal becomes a rallying point through which other defectors can coordinate and cover their asses so that the ruling coalition doesn’t punish them. What is a good excuse?

Leftism is a great excuse. Claiming that the ruling coalition isn’t leftist enough, isn’t holy enough, not inclusive enough of women, of blacks, of gays, or gorillas, of pedophiles, of murderous Salafists, is the perfect way of signalling your disloyalty towards the existing power coalition. By using the existing ideology and pushing its logic just a little bit, you ensure that the powerful can’t punish you. At least not openly. And if you’re lucky, the mass of disloyal fucks in the ruling coalition might join your banner, and use your exact leftist point to jump ship and outflank the powerful.

...

The same dynamic fuels the flattery inflation one sees in monarchical or dictatorial systems. In Mao China, if you want to defect, you claim to love Mao more than your boss. In Nazi Germany, you proclaim your love for Hitler and the great insight of his plan to take Stalingrad. In the Roman Empire, you claimed that Caesar is a God, son of Hercules, and those who deny it are treacherous bastards. In Ancient Persia you loudly proclaimed your faith in the Shah being the brother of the Sun and the Moon and King of all Kings on Earth. In Reformation Europe you proclaimed that you have discovered something new in the Bible and everybody else is damned to hell. Predestined by God!

...

And again: the precise content of the ideological point doesn’t matter. Your human brain doesn’t care about ideology. Humans didn’t evolve to care about Marxist theory of class struggle, or about LGBTQWERTY theories of social identity. You just don’t know what it means. It’s all abstract points you’ve been told in a classroom. It doesn’t actually compute. Nothing that anybody ever said in a political debate ever made any actual, concrete sense to a human being.

So why do we care so much about politics? What’s the point of ideology? Ideology is just the water you swim in. It is a structured database of excuses, to be used to signal your allegiance or defection to the existing ruling coalition. Ideology is just the feed of the rationalization Hamster that runs incessantly in that corner of your brain. But it is immaterial, and in most cases actually inaccessible to the logical modules in your brain.

Nobody ever acts on their overt ideological claims if they can get away with it. Liberals proclaim their faith in the potential of black children while clustering in all white suburbs. Communist party members loudly talk about the proletariat while being hedonistic spenders. Al Gore talks about Global Warming while living in a lavish mansion. Cognitive dissonance, you say? No; those cognitive systems are not connected in the first place.

...

And so, every little step in the way, power-seekers moved the consensus to the left. And open societies, democratic systems are by their decentralized nature, and by the size of their constituencies, much more vulnerable to this sort of signalling attacks. It is but impossible to appraise and enforce the loyalty of every single individual involved in a modern state. There’s too many of them. A Medieval King had a better chance of it; hence the slow movement of ideological innovation in those days. But the bigger the organization, the harder it is to gather accurate information of the loyalty of the whole coalition; and hence the ideological movement accelerates. And there is no stopping it.

Like the Ancients, We Have Gods. They’ll Get Greater: http://www.overcomingbias.com/2018/04/like-the-ancients-we-have-gods-they-may-get… [more]
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june 2017 by nhaliday
The Agricultural Basis of Comparative Development
This article shows, in a two-sector Malthusian model of endogenous population growth, that output per capita, population density, and industrialization depend upon the labor intensity of agricultural production. Because the diminishing returns to labor are less pronounced, high labor intensity (as in rice production) leads not only to a larger population density but also to lower output per capita and a larger share of labor in agriculture. Agronomic and historical evidence confirm that there are distinct, inherent differences between rice and wheat production. A calibration of the model shows that a relatively small difference in labor intensity in agriculture can account for a large portion of the observed differences in industrialization, output per capita, and labor productivity between Asia and Europe prior to the Industrial Revolution. Significantly, these differences can be explained even though sector-level total factor productivity levels and the efficiency of factor markets are held constant in the two regions.

INDUSTRIOUS PEASANTS IN EAST AND WEST: MARKETS, TECHNOLOGY, AND FAMILY STRUCTURE IN JAPANESE AND WESTERN EUROPEAN AGRICULTURE: http://sci-hub.tw/http://onlinelibrary.wiley.com/doi/10.1111/j.1467-8446.2011.00331.x/abstract
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june 2017 by nhaliday
On the economics of the Neolithic Revolution | A Fine Theorem
Matranga writes a simple Malthusian model. The benefit of being nomadic is that you can move to places with better food supply. The benefit of being sedentary is that you use storage technology to insure yourself against lean times, even if that insurance comes at the cost of lower food intake overall. Nomadism, then, is better than settling when there are lots of nearby areas with uncorrelated food availability shocks (since otherwise why bother to move?) or when the potential shocks you might face across the whole area you travel are not that severe (in which case why bother to store food?). If fertility depends on constant access to food, then for Malthusian reasons the settled populations who store food will grow until everyone is just at subsistence, whereas the nomadic populations will eat a surplus during times when food is abundant.

It turns out that global “seasonality” – or the difference across the year in terms of temperature and rainfall – was extraordinarily high right around the time agriculture first popped up in the Fertile Crescent. Matranga uses some standard climatic datasets to show that six of the seven independent inventions of agriculture appear to have happened soon after increases in seasonality in their respective regions. This is driven by an increase in seasonality and not just an increase in rainfall or heat: agriculture appears in the cold Andes and in the hot Mideast and in the moderate Chinese heartland. Further, adoption of settlement once your neighbors are farming is most common when you live on relatively flat ground, with little opportunity to change elevation to pursue food sources as seasonality increases. Biological evidence (using something called “Harris lines” on your bones) appears to support to idea that nomads were both better fed yet more subject to seasonal shocks than settled peoples.

FROM FORAGING TO FARMING:
EXPLAINING THE NEOLITHIC
REVOLUTION: http://sci-hub.tw/10.1111/j.0950-0804.2005.00259.x
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june 2017 by nhaliday
Destruction under the Mongol Empire - Wikipedia
The death and destruction during the 13th century Mongol conquests have been widely noted in both the scholarly literature and popular memory. It has been calculated that approximately 5% of the world's population were killed during Turco-Mongol invasions or in their immediate aftermath. If these calculations are accurate, this would make the events the hitherto deadliest acts of mass killings in human history.

http://onlinelibrary.wiley.com/doi/10.1029/2009GB003488/full
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june 2017 by nhaliday
Global Warming: Who Loses—and Who Wins? - The Atlantic
Ideas: What is Wrong with Global Warming Anyway?: http://daviddfriedman.blogspot.com/2011/09/what-is-wrong-with-global-warming.html

No one ever says it, but in many ways global warming will be a good thing: http://www.telegraph.co.uk/news/2016/05/05/no-one-ever-says-it-but-in-many-ways-global-warming-will-be-a-go/
Our climate conversation is lopsided. There is ample room to suggest that climate change has caused this problem or that negative outcome, but any mention of positives is frowned upon. We have known for decades that increasing CO₂ and precipitation from global warming will make the world much greener – by the end of the century, it is likely that global biomass will have increased by forty percent.

hmm:
The great nutrient collapse: http://www.politico.com/agenda/story/2017/09/13/food-nutrients-carbon-dioxide-000511
The atmosphere is literally changing the food we eat, for the worse. And almost nobody is paying attention.

Climate change makes poor countries poorer, widening global inequality, researchers say: https://edition.cnn.com/2019/04/22/economy/inequality-climate-change/index.html
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may 2017 by nhaliday
Edge.org: 2017 : WHAT SCIENTIFIC TERM OR CONCEPT OUGHT TO BE MORE WIDELY KNOWN?
highlights:
- the genetic book of the dead [Dawkins]
- complementarity [Frank Wilczek]
- relative information
- effective theory [Lisa Randall]
- affordances [Dennett]
- spontaneous symmetry breaking
- relatedly, equipoise [Nicholas Christakis]
- case-based reasoning
- population reasoning (eg, common law)
- criticality [Cesar Hidalgo]
- Haldan's law of the right size (!SCALE!)
- polygenic scores
- non-ergodic
- ansatz
- state [Aaronson]: http://www.scottaaronson.com/blog/?p=3075
- transfer learning
- effect size
- satisficing
- scaling
- the breeder's equation [Greg Cochran]
- impedance matching

soft:
- reciprocal altruism
- life history [Plomin]
- intellectual honesty [Sam Harris]
- coalitional instinct (interesting claim: building coalitions around "rationality" actually makes it more difficult to update on new evidence as it makes you look like a bad person, eg, the Cathedral)
basically same: https://twitter.com/ortoiseortoise/status/903682354367143936

more: https://www.edge.org/conversation/john_tooby-coalitional-instincts

interesting timing. how woke is this dude?
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may 2017 by nhaliday
What are the big deals when linking demographics and politics? | We the Pleeple
You can see in the chart that religion/church (the black bars) and race/immigrant (the green bars) are just way bigger deals than education, age, gender, income, and region/density. Further, there are some kinds of items where race/immigrant variables are particularly big deals (party identification along with views on rich-poor issues, immigration, gun regulation, racial issues, and white nationalism, which combines views on immigration, race, etc.), while there are other kinds of items where religion/church variables are clearly the dominant demographic predictors (self-labelled liberal/conservative ideology along with views on homosexuality, abortion, marijuana legalization, environmental regulation, and Middle Eastern conflicts).
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may 2017 by nhaliday
What would count as an explanation of the size of China? - Marginal REVOLUTION
https://twitter.com/Peter_Turchin/status/863556431898959874
http://peterturchin.com/PDF/Turchin_JGH_2009.pdf
http://peterturchin.com/PDF/Turchin_etal_PNAS2013.pdf
http://marginalrevolution.com/marginalrevolution/2017/05/rome-vs-china.html
http://peterturchin.com/cliodynamica/why-europe-is-not-china/

https://twitter.com/pseudoerasmus/status/965578066402607104
https://archive.is/OoiD3
Wades into the age-old debate: why did post-Roman Europe remain fragmented but China had such a long and early history of unification? It's not geography per se, but how geography interacted with warfare & state formation

https://twitter.com/MarkKoyama/status/965297433495224325
https://archive.is/lkf8g

https://twitter.com/C_Harwick/status/1193595960720601089
https://archive.is/QSNm5

Unified China and Divided Europe: http://sci-hub.tw/http://onlinelibrary.wiley.com/doi/10.1111/iere.12270/full

From the ‘Great Convergence’ to the ‘First Great Divergence’: Roman and Qin-Han state formation and its aftermath: https://www.princeton.edu/~pswpc/pdfs/scheidel/110702.pdf

https://twitter.com/whyvert/status/1203328015322599424
https://archive.is/OhPoF
Knights Hospitaller thread
--
https://archive.is/MJYKD
Sod Pepsi's navy.

Let's talk about the point after WW2 where the Knights Hospitaller, of medieval crusading fame, 'accidentally' became a major European air power.

I shitteth ye not. 🛩️🛩️
...
Now the important thing here is the CONTINUED EXISTENCE AS A SOVEREIGN STATE of the Knights Hospitaller. They held Malta right up until 1798, when Napoleon finally managed to boot them out on his way to Egypt.

(Partly because the French contingent of the Knights swapped sides)
...
And that's why today, even thought they are now fully committed to the Red-Cross-esque stuff, they can still issue passports, are a permanent observer at the UN, have a currency...

..,and even have a tiny bit of Malta back.

More here:
--
Having a lot of small functional states instead of a few big ones is cool for entertainment and variety reasons.
--
The MENA was also polyarchic in the Middle Ages, but did it produce interesting states?
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may 2017 by nhaliday
Climate change and agriculture - Wikipedia
Climate change impacts on global agricultural land availability: http://iopscience.iop.org/article/10.1088/1748-9326/6/1/014014/meta
Regions characterized by relatively high latitudes such as Russia, China and the US may expect an increase of total arable land by 37–67%, 22–36% and 4–17%, respectively, while tropical and sub-tropical regions may suffer different levels of lost arable land. For example, South America may lose 1–21% of its arable land area, Africa 1–18%, Europe 11–17%, and India 2–4%. When considering, in addition, land used for human settlements and natural conservation, the net potential arable land may decrease even further worldwide by the end of the 21st century under both scenarios due to population growth. Regionally, it is likely that both climate change and population growth will cause reductions in arable land in Africa, South America, India and Europe. However, in Russia, China and the US, significant arable land increases may still be possible. Although the magnitudes of the projected changes vary by scenario, the increasing or decreasing trends in arable land area are regionally consistent.
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may 2017 by nhaliday
What is the likelihood we run out of fossil fuels before we can switch to renewable energy sources? - Quora
1) Can we de-carbon our primary energy production before global warming severely damages human civilization? In the short term this means switching from coal to natural gas, and in the long term replacing both coal and gas generation with carbon-neutral sources such as renewables or nuclear. The developed world cannot accomplish this alone -- it requires worldwide action, and most of the pain will be felt by large developing nations such as India and China. Ultimately this is a political and economic problem. The technology to eliminate most carbon from electricity generation exists today at fairly reasonable cost.

2) Can we develop a better transportation energy storage technology than oil, before market forces drive prices to levels that severely damage the global economy? Fossil fuels are a source of energy, but primarily we use oil in vehicles because it is an exceptional energy TRANSPORT medium. Renewables cannot meet this need because battery technology is completely uncompetitive for most fuel consumers -- prices are an order of magnitude too high and energy density is an order of magnitude too low for adoption of all-electric vehicles outside developed-world urban centers. (Heavy trucking, cargo ships, airplanes, etc will never be all-electric with chemical batteries. There are hard physical limits to the energy density of electrochemical reactions. I'm not convinced passenger vehicles will go all-electric in our lifetimes either.) There are many important technologies in existence that will gain increasing traction in the next 50 years such as natural gas automobiles and improved gas/electric hybrids, but ultimately we need a better way to store power than fossil fuels. _This is a deep technological problem that will not be solved by incremental improvements in battery chemistry or any process currently in the R&D pipeline_.

Based on these two unresolved issues, _I place the odds of us avoiding fossil-fuel-related energy issues (major climate or economic damage) at less than 10%_. The impetus for the major changes required will not be sufficiently urgent until the world is seeing severe and undeniable impacts. Civilization will certainly survive -- but there will be no small amount of human suffering during the transition to whatever comes next.

- Ryan Carlyle
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may 2017 by nhaliday
Typos | West Hunter
In a simple model, a given mutant has an equilibrium frequency μ/s, when μ is the mutation rate from good to bad alleles and s is the size of the selective disadvantage. To estimate the total impact of mutation at that locus, you multiply the frequency by the expected harm, s: which means that the fitness decrease (from effects at that locus) is just μ, the mutation rate. If we assume that these fitness effects are multiplicative, the total fitness decrease (also called ‘mutational load’) is approximately 1 – exp(-U), when U is where U=Σ2μ, the total number of new harmful mutations per diploid individual.

https://westhunt.wordpress.com/2012/10/17/more-to-go-wrong/

https://westhunt.wordpress.com/2012/07/13/sanctuary/
interesting, suggestive comment on Africa:
https://westhunt.wordpress.com/2012/07/13/sanctuary/#comment-3671
https://westhunt.wordpress.com/2012/07/14/too-darn-hot/
http://infoproc.blogspot.com/2012/07/rare-variants-and-human-genetic.html
https://westhunt.wordpress.com/2012/07/18/changes-in-attitudes/
https://westhunt.wordpress.com/2012/08/24/men-and-macaques/
I have reason to believe that few people understand genetic load very well, probably for self-referential reasons, but better explanations are possible.

One key point is that the amount of neutral variation is determined by the long-term mutational rate and population history, while the amount of deleterious variation [genetic load] is set by the selective pressures and the prevailing mutation rate over a much shorter time scale. For example, if you consider the class of mutations that reduce fitness by 1%, what matters is the past few thousand years, not the past few tens or hundreds of of thousands of years.

...

So, assuming that African populations have more neutral variation than non-African populations (which is well-established), what do we expect to see when we compare the levels of probably-damaging mutations in those two populations? If the Africans and non-Africans had experienced essentially similar mutation rates and selective pressures over the past few thousand years, we would expect to see the same levels of probably-damaging mutations. Bottlenecks that happened at the last glacial maximum or in the expansion out of Africa are irrelevant – too long ago to matter.

But we don’t. The amount of rare synonymous stuff is about 22% higher in Africans. The amount of rare nonsynonymous stuff (usually at least slightly deleterious) is 20.6% higher. The number of rare variants predicted to be more deleterious is ~21.6% higher. The amount of stuff predicted to be even more deleterious is ~27% higher. The number of harmful looking loss-of-function mutations (yet more deleterious) is 25% higher.

It looks as if the excess grows as the severity of the mutations increases. There is a scenario in which this is possible: the mutation rate in Africa has increased recently. Not yesterday, but, say, over the past few thousand years.

...

What is the most likely cause of such variations in the mutation rate? Right now, I’d say differences in average paternal age. We know that modest differences (~5 years) in average paternal age can easily generate ~20% differences in the mutation rate. Such between-population differences in mutation rates seem quite plausible, particularly since the Neolithic.
https://westhunt.wordpress.com/2016/04/10/bugs-versus-drift/
more recent: https://westhunt.wordpress.com/2017/06/06/happy-families-are-all-alike-every-unhappy-family-is-unhappy-in-its-own-way/#comment-92491
Probably not, but the question is complex: depends on the shape of the deleterious mutational spectrum [which we don’t know], ancient and recent demography, paternal age, and the extent of truncation selection in the population.
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may 2017 by nhaliday
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