"Why do we do what we do?" In this thought-provoking series of lectures, Allen D. MacNeill examines the surprising-and sometimes unsettling-answers to this most basic of human questions. The remarkable new field of evolutionary psychology takes a scientific approach to the evolution of human nature. Analyzing human behavior in relation to food, clothing, shelter, health care, and sex, Evolutionary Psychology proves an immensely stimulating exploration of human endeavor.