Jonathan Rauch. “One Man, Many Wives, Big Problems. The social consequences of polygamy are bigger than you think”. April 3, 2006 – “The second crucial word is “polygyny.” Unlike gay marriage, polygamy has been a common form of marriage since at least biblical times, and probably long before. In his 1994 book The Moral Animal: The New Science of Evolutionary Psychology, Robert Wright notes that a “huge majority” of the human societies for which anthropologists have data have been polygamous. Virtually all of those have been polygynous: that is, one husband, multiple wives. Polyandry (one wife, many husbands) is vanishingly rare. The real-world practice of polygamy seems to flow from men’s desire to marry all the women they can have children with.