Limited government and restricting definition of marriage

There is a unique argument by William J. Haun at First Things on why those who believe in limited government should oppose expanding the definition of marriage to include same-sex couples. It sounds counter-intuitive, but it is not. Haun says that, "The new basis of marriage, same-sex marriage advocates tell us, is not procreation or sexual difference, but love. For them, the personal promises [...]