20 years worth of baptisms invalidated

Eeyore is citing well documented research- infants and many other primates (bonobos especially, chumps not so much) have innate sense of fairness- if they’re being rewarded for something and someone else isn’t, they will instinctively share

And that is not in conflict with your observation- one can have a sense of ‘mine’ and still try to fight the inequities of an unjust reward system
Not just primates either. There was a fun experiment with rats. Basically one rat gets some tasty treats and another rat is trapped. First rat can have all the food to themselves, or free the other rat and share. A majority of rats freed the other rat.

https://www.scientificamerican.com/article/jailbreak-rat/
... what was this thread about again?