Memes

I recommend this thread, though maybe don't bother going down the chain that far as it becomes a stalemate.

Essentially, you're correct in that tribal societies were very communistic, but not Communist. Marxists call this "primitive communism," as a distinguishing factor from Communism, a highly industrialized and global society emerging from Socialism.

The truth is, all modes of production are "human nature." Human nature, after all, is malleable, and is largely determined by which mode of production humanity finds itself in. Each mode of production turns into another due to human nature, Capitalism is merely also human nature, just like feudalism, tribal societies, as is Socialism and eventually Communism.

I'd say it depends more on the Mode of Production. Early humanity found it integral to survive, and many groups even today rely on Mutual Aid to continue. However, it isn't a hard requirement across all classes in society, yet these class formations are also "human nature," just as the conditions to eventually abolish class society are "human nature" as well.