Marxists theorize that Capitalism is ultimately destructive, while Communism is constructive.

It may take numerous iterations, but eventually the functional societies will outcompete the dysfunctional ones. We're already seeing this in East Asia, as China eclipses its neighbours. And we're beginning to see it in Latin America, as socialist states reemerge in the absence of a functional American espionage system. Watching countries like N.Korea and Cuba endure decades of sanction and embargo should illustrate their durability relative to Western economic models.

But it took centuries for colonization to run its course. I don't think Communism will assert itself on a truly global scale in my lifetime.