http://www.treesandthings.com/story/2008/5/20/125517/813 In Slate magazine's "Human Nature" column, William Saletan <a rel="nofollow" href="http://www.slate.com/id/2191504/">argues that</a> societal constraints against incest, polygamy, and homosexuality all have roughly the same roots, and that those reasons are becoming less and less compelling in modern society. en-us Thu, 22 May 2008 13:41:48 EST string http://www.treesandthings.com/search/