John Witte Jr., director of the Center for the Study of Law and Religion at Emory University, and author of a forthcoming title, “Why Two in One Flesh: The Western Case for Monogamy over Polygamy" writes in the Washington Post:
"Creationists and evolutionists don’t agree on much, but they both believe that monogamy is the most “natural” form of reproduction for the human species. This seems counterintuitive. Yes, the Bible recounts the story of creation, but it also describes the rampant polygamy of Abraham, Jacob, David, and Solomon and other titans of the faith. Yes, nesting birds, voles, and a few other animals are monogamous, but most mammals reproduce with one dominant male controlling a large harem of females. Polygamy seems “natural,” monogamy “supernatural.”
Yet, for the past millennium, Christians and post-Christian liberals alike – Aquinas, Calvin, Locke, Hume, and Jefferson -- all agreed that God created humans to reproduce by becoming “two in one flesh,” not three or four. And modern evolutionary scientists, from Claude Lèvi-Straussto Bernard Chapais, have concluded the same: that pair-bonding is part of the “deep structure” of human reproduction that humans have evolved as their best strategy for survival and success...."