Capitalism is the most sustainable model we have in every respect, as shitty as it is at the moment. It brought us great advances in medicine, agriculture and industry. The problem is it’s going off the rails of regulation and the government isn’t doing shit because they rely on private investing to pay down their debt. Communism has always led to a power vacuum that gets filled by someone who wishes to capitalize on power. Humanity can be given equal opportunity but the ranks always sort themselves out into a hierarchy eventually. Ancient China got close to a perfect utopia, but that was during a time where almost all men and women were made perfect in their virtue by perfect leaders as examples.