In the aftermath of Fukuyama's essay, Bill Kristol is feeling defensive.
It would be nice to wait until we were certain conditions were ripe before we had to act, a world in which the obstacles are trivial and the enemies fold up. Unfortunately, that is not the world we live in.
To govern is to choose, and to accept responsibility for one's choices. To govern is not wishfully to await the end of history. To govern is not fatalistically to watch a clash of civilizations from the sidelines.