Things like "human nature" are really constructed by and predicated on our modes of production and social environment. Everything we are is what we learn from others around us, there's very little that's "innate." Humans *under capitalism* are all "I me mine", but that does not mean that we will be like that forever. If you want some examples of different possibilities, of the way things were and the way things could be, I encourage you to check out *The Dawn of Everything* by the late Graeber.
Interesting. Thank you!