Author Archives: gcochran9

Domesticated animals and human disease

Jared Diamond considered the disastrous impact of Eurasian and African diseases on the inhabitants of the New World, contrasted with a much smaller impact in the opposite direction, and concluded that a major factor had probably been transmission from domesticated … Continue reading

Posted in GGS | 52 Comments

Regional change

Jared Diamond thinks that people in different parts of the world can and have evolved in different directions, depending on local selective pressures. He thinks that people in Eurasia and Africa evolved resistance to various crowd and tropical diseases, and … Continue reading

Posted in GGS | 69 Comments

Psychometrics

Jared Diamond says ” Sound evidence for the existence of human differences in intelligence that parallel human differences in technology is lacking.” In short, he dismisses the entire field of psychometrics. Doesn’t even bother to argue about it. The word … Continue reading

Posted in GGS, Uncategorized | 62 Comments

Something changed

Jared Diamond notes (p 161) that the wild ancestors of domesticated animals are spread unevenly – only two are in South America, while none come from North America, sub-Saharan Africa, or Australia. He then argues that only a few special … Continue reading

Posted in GGS, Uncategorized | 90 Comments

mtDNA capers

There’s an interesting pattern in the mtDNA of archaic humans. Neanderthals have mtDNA that’s a lot closer to that of anatomically modern humans than to Denisovans, although Neanderthals and Denisovans are close if you look at nuclear DNA. While really … Continue reading

Posted in Archaic humans, Denisovans, Genetics, Neanderthals | 6 Comments

Persistence

Jared Diamond notices that early development of complex civilizations had ongoing consequences: peoples that developed such things way later or not at all continue to do poorly today, even if they encountered Western technology and technologists several hundred years ago. … Continue reading

Posted in GGS, Uncategorized | 64 Comments

Norse trace

Jennifer Raff has an article in the Guardian, discussing why there’s no genetic sign of black African ancestry ( from Roman times) in contemporary British DNA. Well, the simple explanation is very few such people ever came to Britain. She … Continue reading

Posted in Uncategorized | 35 Comments