If you had to resolve the "opposing" views if human nature between Hobbes and Aristotle, you'd have to assay every human and hope for a majority of one or the other. And that might still not be enough. Maybe there is no answer.

It's somewhat established that there is a separate genotype for each of the two dispositions. The reason one has not been selected over the other is that some environments favor one and other environments favor the other, so they both survive.