Richest country in the world, and yet life spans have been stagnant and recently been dropping, infrastructure has been crumbling, and American lives have become completely dependent on abusive labor practices and dirty industry of foreign countries to keep the bottom of their economy from collapsing.

US gained a lot of world power after WW2 when other western countries were rebuilding. Do we know for certain it because of capitalism and not that US had lots of virgin resources to exploit in relative isolation while the other powers rebuilt.

All the major powers are capatilistic now. There is a spectrum but it is capitalism. In some governments will push their weight around to get what they want but it's still capitalism

A good portion of that wealth came from stealing good land and forcing people to work as slaves.

Not the most capitalistic wealth creation