In their pure forms, I see capitalism and communism as extremes specifically with regards to human nature.
Communism starves our human impulses to succeed and grow, but capitalism gluts and force feeds our worst impulses exclusively, selfishness, unhealthy competition, jealousy, schadenfreude, sociopathy, self-delusion, narcissism, dehumanization, on and on, which is why I see it as the greater evil of the 2 in a vacuum.
A successful communist society would be very difficult to grow, but maybe that would be a good thing on a planet of finite resources that can take finite finite pollution. That’s why the answer lies somewhere in democratic socialism, imho.
That’s all academic though. The rigged market hyper-capitalists own this fucking place and have an iron grip on it. Plus communism would have kept the population low, as it should have been. It wouldn’t be able to accommodate the needs of our ridiculously massive human population as it is. That ship has sailed unless we want billions to starve to right it and live within sustainable means in this finite habitat.