General purpose cooperation is what took homosapiens to the top, baby !

Altruism and compassion have been part of us for 50,000 years.

The Burial Site at Shandihar Cave included evidence of Flowers being put in graves

https://www.cambridge.org/core/journals/antiquity/article/new-neanderthal-remains-associated-with-the-flower-burial-at-shanidar-cave/E7E94F650FF5488680829048FA72E32A

"But What About Human Nature!?" is the Dumbest Conservative Argument

It's true that cruelty has been around for longer than capitalism; it's untrue, though, that it has to be "unlearned". Every experiment (that I've learned about) demonstrated that even toddlers care about fairness, which (I would argue) is inherently opposed to cruelty