My take on this is that the greatness in humanity comes from being a bunch of egoistic assholes capable of doing the right thing and help each other.
A selfless person doing something selfless is normal. A egoist doing something egoistic is normal. An egoist doing something altruistic is what raises us from pure instinct to humanity.

"And when all those self made champions went away and created a new society, free of the old one, one of them asked 'does anyone of us know how to cook?'. And then they screamed in fear".