Hum Hist I 11 ho 4

Hum Hist I 11 ho 4 - Human History Week 3, lecture 1...

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Human History Week 3, lecture 1 Domestication 1/19/11 Modern humanity Gradual emergence of modern human behavior between 150kya and 70kya (e.g., inscribed ocher stick from Blombos, South Africa), then “sudden” appearance of fully modern traits by 50kya (e.g., Chauvet cave paintings, France, 30kya) Possible role of Mt Toba eruption, 73kya, in creating genetic bottleneck and changing fitness landscape by driving many rivals of Homo sapiens into extinction Homo sapiens rapidly spreads out of Africa after 70kya: supremely adaptive Possibly disastrous effects for other species Early modern human lifestyles Before 20kya, modern humans live in touch ice age environments Able to extract very little energy: typically, 4,000 kilocalories per person per day (kcal/cap/day) Live as highly mobile hunter-gatherers in groups of 10-20, following ripening plants and migrating animals Very few material goods Very low life expectancy (at birth, 20-25 years) Very low levels of hierarchy In modern hunter-gatherer populations, adult men tend to dominate decisions, but have
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This note was uploaded on 03/06/2012 for the course IHUM 69 taught by Professor Morris during the Winter '10 term at Stanford.

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Hum Hist I 11 ho 4 - Human History Week 3, lecture 1...

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