It's funny, because extreme poverty rates as defined by the UN have been decimated in the last century, and continue to drop, because of growth qua capitalism.

You're reflecting the populist notion that wealth is zero-sum. If that were true we'd still be in caves fighting over sticks. The average quality of life has skyrocketed in the last century alongside growth, and there's no non-capitalist country now or in history that's been an enviable place for average people to live.