Hum Hist 2 ho 9

Hum Hist 2 ho 9 - Human History Week 5, lecture 2 The...

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Human History Week 5, lecture 2 The energy revolution 4/27/11 In some ways, there’s relatively little change in Eurasian core in 1,500 years between 100 and 1600 CE: cycling between empires, pushing energy capture up to the hard ceiling around 30,000-35,000 calories/person/day then falling back in collapses involving disease, migration, famine, state failure, and climate change Hence political economists conclude in late 18th century that nothing can ever change: humans are caught in a Malthusian trap But then around 1800, the hard ceiling is shattered Fossil sunlight Long (if uneven) story of rightward skewing of biological complexity, involving more organized systems capturing more energy from the environment Until c. 1800, humans live almost entirely through immediate return systems Delayed-return exploitation of fossilized energy first seen under Han and Romans in 1st century CE; becomes more serious under Song in 11th century; by 1700 widespread across Eurasia, especially in northern China and northern Europe
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This note was uploaded on 03/06/2012 for the course IHUM 69B taught by Professor Morris during the Spring '11 term at Stanford.

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Hum Hist 2 ho 9 - Human History Week 5, lecture 2 The...

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