Capitalism has thoroughly done its job because it's modified its hosts to evaluates itself on its own successfulness - "We investigated ourselves and found no wrongdoing"[1]-vibes.

By what measures would other systems of social organization measure their success and why aren't we choosing them?

1. https://knowyourmeme.com/memes/we-investigated-ourselves-and...

One could say most humans aren't even the hosts of capitalism. We're the excess nutrients capitalism consumes from its hosts.