I just read a really good article on "What You Can't Say"
Here's the line I think sums it up the best and is very true when considering the latest clash of the Religious Right vs. Gay America in the fight for rights and marriage.
"I suspect the biggest source of moral taboos will turn out to be power struggles in which one side only barely has the upper hand. That's where you'll find a group powerful enough to enforce taboos, but weak enough to need them." - Paul Graham
Yes, this implies that the Church's dominance is once again waning as the moral beacon for the world. They've already lost the ability to be the intellectual beacon. That was called the Renaissance which heralded the end of the dark ages where the church kept books and the written word strictly controlled in the confines of the monks who transcribed everything. The printing press was one of the harbringers of the end of the Church's dominance on the every day people's thinkings.
In time we will look back on this time of strife and conflict and say "What were people thinking? Its so obvious that any couple who loves each other should marry." Just like we currently can't fathom what's wrong with a black and a white person marrying, or a Christian and a Jew. In time taboos fade, I only hope that it doesnt' take too long in this instance.