>what's up with the bounds of our imagination? How come they're limitless when it comes to facing off against gravity, and completely defeatist when it comes to erasing class distinctions?

In my experience, that's only true in America.

People in Canada, Australia, England and Argentina and perfectly happy to discuss and debate ideas and ways to remove (or drastically reduce) class distinctions. Politicians even enact policy to do it.

I think the propaganda of "The Communists" has been drilled into the American public so solidly, it's not only un-American to suggest a change to the status quo, it's also considered utterly impossible.