However, further research has shown that it is the normal condition for humans and for most other mammals. It seems pretty clear why this is the case for most mammals and for most human beings.
“Technique! The very word is like a shriek of outraged Art. It is the idiot name given to effort by those who are too weak, too weary, or too dull to play the game. The mighty have no theory of technique.”
“Let us try to teach generosity and altruism, because we are born selfish.”