In an effort to protect traditional marriage, I believe we should make both the moral argument; i.e., God created marriage and calls same-sex relationships an abomination; and the “secular” or practical argument; i.e., that the state plays an important role in marriage because it is best for children that may be produced as a result. A child reared in the same home with his mother and father, who are married, has the best chance of not ending up in poverty and/or the criminal justice system, which would impose a cost to the state. Here is a link to a helpful booklet that outlines the secular argument for traditional marriage.