People are inherently selfish. It’s in our genes

What makes you say that? Humans, before the establishment of classes, lived for millennia (and some still do) in small, relatively egalitarian communities characterized by the collective or common ownership of resources, where everyone worked to provide for the means of subsistence of each other, in what some call primitive communism. That is the very opposite of being selfish. In fact, I’d say that the very capacity for humans to adapt to their environment and to cooperate with others is what made humans such a successful species. If humans were selfish by nature, they would have become extinct by now.