Data from a number of studies indicate that primates are more likely to behave altruistically toward kin than toward non-kin. however, many of the same studies show that rates of aggression toward kin and non-kin are basically the same. how does this fit with what you learned about kin selection? why are monkeys as likely to fight with kin as with non-kin? answer

The reason that primates will probably carry on benevolently toward family than towards non-kinfolk is that they invest more energy with kinfolk, they can without much of a stretch perceive family and subsequently monitor selfless conduct given and got. It is along this same line of thinking that family would likewise battle more than non-kinfolk. Since primates frequently invest more energy with their kinfolk than non-family they will probably battle and have question with them and additionally act selflessly

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