well, I don't know if mankind was originally at a state of sustainable harmony but it honestly seems like it would have been that way pre-society anyway. Animals in nature, at least mammals, rarely kill one another in the same group. I think we'd be similar to that and we wouldn't be so competitive and bloodthirsty but that's probably just silly of me to say that. I so badly wish humans were more at a state of natural peace with one another, if that is, in fact, natural and human.