Nuñoa case study

Nuñoa case study - Nuoa case study...

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Nuñoa case study One of the most careful and interesting studies of human energy flow = Quechua speaking Indians of Nuñoa, highland Peru (in heart of Inca homeland), conducted by Brooke Thomas and others in 1960's and 70's TRENDS IN ENERGY EFFICIENCY Intro Various scholars have proposed that human subsistence and energy use exhibit several general historical or evolutionary trends: 1) an increase in amount of energy harnessed per capita 2) an increase in efficiency (returns per unit labor) 3) a tendency for human population density to increase to maximum possible in a given environment with a given technology (carrying capacity) Here we examine the first 2 proposed tendencies, deferring consideration of 3rd to next section of course (on "population ecology") Amount of Energy Table provides one estimate of growth of energy flow per capita at various "stages" of human biological and cultural evolution; same data illustrated in graph Systems powered only by metabolic energy (muscle power) can harness only energy
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