With respect to the ‘early communism’, there is a very large caveat. These ‘communal’ groups where ethnically, racially, and culturally homogeneous ‘small’ (by modern standard) people groups who where by in large extended families. There is no comparison possible between that type of grouping and modern human society. Humans might be willing to miss a few good meals to ensure my kids or parents where provided for, but En masse won’t lift a finger for their neighbor neighbor, let alone someone in the city or state next door. Hence why leftist social policy at scale has always relied on strongman authoritarian leadership in actual practice.

TL;DR Hairless monkeys are in-group favoring, mammalian magpie-like hoarders. Why would you expect something like ‘global good will’ to magically be embraced by the multitudes.