

Game theory is about extracting personal good from cooperation. Game theory has nothing to say against boiling your cat alive as it has no leverage on you.
In societies where things like slavery existed for centuries or even millennias, owners had great evolutionary benefit from owning slaves. Their descendants hold some privileges to this day. Game theory was on their side.
Did you watch “86”? In this show, San-Magnolia was a country populated exclusively with blonde people, referred as “alba”. People with non-white hair (referred as “colorata”) were sent to internment camps outside the state walls and conscripted to fight in a war in a hope to regain at least some rights.
It was later revealed that over 10 million colorata and zero alba were killed in the later stage of the war, and if original prognosis on enemy forces ceasing to operate in a few years would be correct, alba people would totally win the evolutionary race and no game theory would bring justice. Doesn’t sound great if your hair happens to be brown or red.


An attribution requirement isn’t enough to enforce a share-alike clause, it has to be there from the beginning.
You can select Wikipedia’s CC BY-SA license that requires to keep derivative projects under CC BY-SA. I don’t think CC SA without BY exists, but you can partially waive attribution requirements yourself as Wikipedia does this.
Also, for “free as in grantis” there is CC BY-NC-SA that explicitly bans commercial use, but I wouldn’t recommend it’s use as it’s not compatible with the orders of magnitude more popular BY-SA. A regular BY-SA license doesn’t prohibit from selling your or derivative works by another party, but it also allows everyone to legally “pirate” these works, so there’s little problem for the NC variant to solve.
BTW, any licenses imposing any restrictions can’t be called “public domain”, there are other words to describe them like “freely licensed”.