Thats why trustoworthy people, kind people, humble people, sober people, and so on, are so well revered. They're able to mentally bypass first their primal good/bad system, then suppress the urge to be selfish, and even grow past the want to help others simply for your own benefit. They act completely (almost, you'll allways act out of self interest no matter what, its just how our brains work) out of selflessness. They care about YOU, and not themselves. Which is really really weird, since the entire point of all of those systems is to care for yourself. But stepping back you see that its just the final, most advanced layer to your own survival: full teamwork and cooperation with others means a fully cohesive species that operates as one unit, no taking for yourself or hurting those around you. Survival rate is literally maximized. A fully altruistic (as in selfless) species is the one that, in the context of high cognition, will have the highest survival rate.

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