The religious skeptic David Hume is not often cited by cultural and social conservatives, but Russell Nieli at the Public Discourse writes a surprising article about Hume's explicit, and reasoned, objections to easy divorce and polygamy. His arguments considered today make for an interesting "reasonable" defense for tradition marriage, by which is meant marriages that are lifelong, monogamous, and of course "heterosexual," which he didn't need to point out. "Gay marriage" is a recent "invention" and not serious, but a reflection on how unserious marriage itself has become.