The Social Leap: The New Evolutionary Science of Who We Are, Where We Come from, and What Makes Us HappyA rollicking tour through humanitys evolutionary past, and von Hippel is the consummate tour guide. With equal parts wisdom, humor, authority, and charm, he shows how our past explains the present and why our well being rests on an understanding of how our minds evolved.Adam Alter, New York Times bestselling author of Drunk Tank Pink and Irresistible Human psychology is rife with contradictions: We work hard to achieve our goals, but happiness at our