I think Fukuyama's "End of History..." died a while ago. Actually, it probably never existed and was simply idealized wishful thinking. As they say, there can be no peace without war.

What's strange is that we know peace eventually ends. But I also can't see how we can have a war amongst nuclear powers. Could we have a peaceful war? Is it possible? Is that what the cold war was?

With the creation of the EU, rising china, resurgence russia, india, ASEAN, africa ( eventually ), the geopolitical landscape is going to change. From a historical, economical and demographic perspective, the geopolitical center should move somewhere in europe or asia from the US eventually. There are 1 billion more chinese. One billion more indians. 500 million more europeans. It is a strange quirk of history that the US is the leader of the world.