Wealth Inequality in America

My friend Harry linked to this video on that social medium place. It's really depressing to me, because I fear something is happening in America that is very much like climate change, and this video really feeds my fear.

Just as the climate seems to have reached a point where it's too late to do anything (we've screwed it up so much and for so long that it has now taken on a life of it's own [melting tundra and all that]), is it possible that wealth in America has become so unbalanced that a slide back into feudalism can't be stopped?

Americans have always been a people who believed in something called "progress." The course of history, we believed, was one of constant improvement of the human condition. Have we been naive?