OBJECTIVES In the past decade many areas of Peru have been undergoing extreme environmental, economic, and cultural change. In the highland hamlet of Chugurpampa, La Libertad, climate change has ruined harvests and led to frequent periods of migration to the coast in search of livelihood. This biocultural research examines how the changes could be affecting the growth of children who maintain r...

Demography plays a large role in cultural evolution through its effects on the effective rate of innovation. If we assume that useful inventions are rare, then small isolated societies will have low rates of invention. In small populations, complex technology will tend to be lost as a result of random loss or incomplete transmission (the Tasmanian effect). Large populations have more inventors ...

When does culture persist and when does it change? We examine a determinant of extent of cultural persistence that has been put forth in the evolutionary anthropology literature: the stability of the environment. A prediction, which is standard in a variety micro-founded models, is that valuing tradition and placing greater importance on maintaining the customs of the previous generation is rel...