Sure. But define “limited resources” and “survive”. When life is zero sum - i.e. either you die or I die, yes humans are often selfish. But in actual day to day

Sure. But define “limited resources” and “survive”. When life is zero sum - i.e. either you die or I die, yes humans are often selfish. But in actual day to day life those situations are exceedingly rare. Our normal drive, in my experience, is to form communities around shared care of common resources - because that is often both in our personal self interest and in our communal interest.