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Greg Cochran

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A persistent misunderstanding both in the world of HBD and general medical and psychological science at large is the notion of what constitutes a "disorder." When does a phenotype represent a physiological or behavioral malady? For behavioral issues, most people regard the Diagnostic and Statistical Manual of Mental Disorders (DSM) as the "final word" on... Read More
Chanda Chisala has been producing pile after pile of nonsense for quite some time. At first, I was content with simply leaving comments at his posts refuting his rubbish because it was rather easy to point out where he was full of baloney. Since then, I've been banned by him, mostly for my signature flair.... Read More
Just as mainstream wisdom on human psychology and evolution is filled with heaps of rubbish (rubbish which I've covered here extensively – see 200 Blog Posts – Everything You Need to Know (To Start)), the space of dissenting voices on this matter is also filled with its own share of rubbish – and worse. I've... Read More
A vigorous discussion has been triggered by the release of Gregory Clark's The Son Also Rises: Surnames and the History of Social Mobility. In this book, Clark details his work which shows a large transmission of status from generation to generation, all across the world, going back centuries. The discussion has raged on the mode... Read More
Post updated, 9/13/14. See below! I haven't always made it explicit, but some of you might gather that I am rather hard on most "environmental" explanations. You have inferred correctly. The reason? Several, which I'll review here. The biggest of these? There is no good evidence for the vast majority of them. That's right, there... Read More
Updated, 10/17/15. See below! In this post, I will review Gregory Cochran's "gay germ" hypothesis. I wanted to make an index of Cochran's posts from his and Henry Harpending's blog West Hunter that discuss it. These posts don't seem to all show up under the "Homosexuality" category there, and I wanted links to them to... Read More
In his most recent post, Greg Cochran quipped that since corporal punishment is a quiet issue these days, it likely works. EDIT: That is, it works in keeping kids in line at school, and only that. Needless to say, the map of states with legal corporal punishment in schools follows the Map of the American... Read More
Readers here will recall my recital of Greg Cochran's hypothesis that obligate male homosexuality is caused by a pathogenic agent, likely a virus (please see 100 Blog Posts – A Reflection on HBD Blogging And What Lies Ahead: Homosexuality (the “gay germ” hypothesis)). This is by far the most likely explanation for male homosexuality (see... Read More
This is my 100th blog post. Upon reaching this milestone, I thought that this would be a great time to take moment to look back at my experience as a blogger in Human BioDiversity (HBD) and share my thoughts on the things to come. 1. The Beginning 2. Fertility 3. Immigration and the economy 4.... Read More
For the record, one can be liberal (as I am) and be against continued mass immigration. Check out these folks: Once every few decades, the stars align for major immigration legislation. According to political analysts, the United States may be at such a juncture now. Barack Obama’s re-election as President has concentrated politicians’ attention on... Read More
A recent article in the UK Daily Mail featured the "Weight of the World" chart made by Visual.ly. It graphically represents the average body mass index (BMI) of the inhabitants the countries of the world. In keeping with my recent series on the matter, I wanted to see what it'd look like if I turned... Read More
Greg Cochran argues that it is highly likely that exclusive male homosexuality is caused by an infectious agent, likely a virus. As he explains, there are several good reasons to suspect that this is the case, including: the low heritability of male same-sex attraction (0.22) the absence of homosexuality in hunter-gatherer populations the relatively high... Read More
Greg Cochran and Henry Harpending have recently proposed a hypothesis on their blog that posits that the lower average IQ of tropical peoples may be related to the number of fitness reducing mutations these people carry. Apparently, the rate of mutation is higher in the tropics. The majority of mutations that occur are neutral and... Read More
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