Esteemed writer and evolutionary biologist David P. Barash tackles this uncomfortable finding: that humans are actually biologically and anthropologically inclined toward polygamy. Drawing on decades of research, Barash presents a remarkable array of scientific evidence from evolutionary biology and cross-cultural studies that guide the reader through the hidden impacts of polygamy on such crucial behavior as violence, parenting, sexual preferences, adultery and efforts at monogamy itself, along with mind-bending speculation about the possible role of our polygamous predisposition when it comes to human genius, homosexuality and even monotheism.