abcZ
It's an interesting conversation, although down the rabbit hole :)
abcZ a fundamental characteristic of human nature is greed
Greed, force, violence are all "consistent with human nature".
Pure forms are always hypothetical and cannot really ever be achieved in the idealized versions described by Marx or Rynd. As you say, Communism will devolve into dictatorship. But LF Capitalism would devolve into anarchy. But that's not set in stone either. More often they evolve into a mix. China is a mix of communism with some capitalism thrown in, and the US is capitalist with plenty of socialism.
abcZ Seems to me that nature tends towards a competitive balance.
Social Darwinism is kinda defunct as a philosophy now. Natural doesn't mean good though. Not good for a society anyway. It'll be natural for the strongest males to kill all competition and take the women. And some early civilizations did this. They were natural, but not sustainable and certainly not considered good.
abcZ Its only when humans impose regulation on nature that things go seriously wrong
It would be a dream for some who despise all regulation, to strip all natural resources from this planet till there's nothing left but a toxic wasteland. As long as they can rule over the rubble.