>>5169"Human nature" is a term made up by philosophers who do not actually know how real human beings work. These talks about the human nature are pointless. The max Aristotle was able to discern was "Humans are capable of reason." Which is, like, almost nothing. And that still does not include people with intellectual disabilities, even though it is true otherwise.
Altruism, like greed, is nurtured through society, there is nothing "innate" about greed or altruism other than some basic psychological mechanisms that give rise to hoarding or generosity, which by themselves are not greed and altruism. Say, you're hungry. And you are given lots of food. You overeat a little. Then you get used to the constant flow of dopamine you get from eating food. And that's how you become glottonous. Glottony is the result of lots of internal and external factors, and saying that glottony is innate is confusing cause and effect and does not take into the account the environment a person is raised in.