Same-sex marriage and polygamy in the same breath? Two (plus one) New York Times debaters think so

Yesterday's "Room for Debate" in the New York Times is about "Marriage: The Next Chapter." I found it interesting that two of the six commentators used the opportunity to mention polygamy. Philosophy professor John Corvino notes that opponents of same-sex marriage "continue to predict a slippery slope to polygamy, polyamory and other “untested, experimental” family forms." He continues: "The