Prehistoric Peruvian civilizations were based on agriculture, which depended
on climatic conditions. The Peruvian coast and mountains are very dry, and
agriculture was only possible during pluvial (rainy) periods. Pluvial
episodes alternated between coastal lowlands and mountain highlands. The Inca
empire existed during the Little Ice Age pluvial period. From World Data Center for Paleoclimatology (educational slide set).
Return to Lecture 19.