I think it would come down to the whole nature/nurture argument.

there was a study of dominance in baboons. what was discovered was that the troop leader had the highest levels of serotonin. lower it and he lost his position. raise a subordinate troop members serotonin and he took up fighting his way to the top as well.

is this conclusive with us? idk. I and my master are both subject to depression at times and he can take ssri without issue infact it is helpful, and for me they make me agitated and aggressive. could it be that he is just adjusted to feeling dominant and i am not? maybe, also we are both alcoholics and children of alcoholics and that makes sense to me as what we inherited alcoholism from our parents as its about a genetic disorder and a way of thinking and reacting to the world around us.

There is so much written into who we are and we have no idea where it all stems from. some social sciences would make it all from some form of disease or dysfunction. Is there an anthropologist in the forum?? curious to see if dominance/submission is just a part of being a primate but don't want to sound like I am quoting anything else (except maybe Bones )