Is "Gay Marriage" Just?

Over at Mercator.net, Robert Reilly discusses whether "same sex marriage" is, as some claim, a matter of social justice. Among his conclusions:

Homosexual marriage is not, as some have suggested, "inclusive," simply making room for another kind of marriage. Its legalization requires the denial of the true nature of marriage.

The piece is a lucid and persuasive case for the irrationality of "homosexual marriage," mostly based on natural law. Check it out for some good arguments with non-religious (and anti-religious) friends and coworkers.