David Barash is an evolutionary biologist, peace activist, and Emeritus Professor of Psychology at the University of Washington. He was an early contributor to the development of the field of sociobiology, focusing more recently on understanding the underlying evolutionary factors influencing human behavior. Since the early 1980s, he has been active as a researcher and advocate in the field of Peace Studies. He has written, co-authored, or edited forty books, most recently Through a Glass Brightly: Using Science to See Our Species as We Really Are and the forthcoming Strength Through Peace: Happiness and Demilitarization in Costa Rica, and What the World Can Learn from a Tiny Central American Country (with Judith Lipton). He holds a PhD in zoology from the University of Wisconsin-Madison.