Of course ruling elites do not give up their projects willingly. Some pressure from below will be needed. Now there is a task worthy of a new millennium. I suppose those who don't value Western Civilization won't give a monkey's whether empire destroys it or not. Anti-imperialists will just have to learn how to talk past them to those who have some lingering attachment to their own inheritance.
Historians go astray quickly when predicting the future.
I won't make any predictions. There is plenty of work to go around. In Quigleyan terms we see signs of the last three phases of civilization empire, decay, and invasion all around us, simultaneously. Too bad so many of the New Left are now in the system. The late shambles of an election may be a good sign.