Why are Amazonian hunter-gatherers better at logic than Harvard students? Why did the Zambian president reject food donations during a famine? And why do billionaires work so hard—only to give their hard-earned money away? In this animated tour of the latest in behavioral science, psychologist Douglas T. Kenrick and marketing professor Vladas Griskevicius argue that while our decision making may seem superficially irrational, our misjudgments are the result of a psychological mismatch between ancestral drives for survival and our modern lifestyles. Ultimately, The Rational Animal offers an uplifting message—that while our brains may still house caveman impulses, we have evolved to be smarter than we think.