You disagree with it being an
exclusive human trait then
I think its a very basic human instinct, maybe the most important one as it helps the species survive.
Many animals do have those traits too. But..why are they all negative ? A deceitful human hunter gatherer could send a rival to where there is no food in order to feed his own family, likewise selfishness can help you and your family survive too, just as slyness keeps all the cards close to your chest as yet another way to help you/your family/your group survive. Spite ; again if its against other groups its perfectly natural even if it is harder to defend.
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