Roger Scruton's "Argument's for Conservatism"

I highly recommend this book.  It is an approachable commentary on modern Western philosophy, and its consequences.  Here's a quote from the chapter entitled "Meaningful Marriage":

"[Gay marriage] resembles Hennry VIII's move to gain eccleslastical endorsement for his divorce, by making himself head of the Church.  The Church that endorsed his divorce thereby ceased to be the Church whose endorsement he was seeking."