Current theories of human evolution place the cause of the explosion of human intelligence to lie in the social competition between members of the species. Presumably, this was to acquire more numerous and more choice of mates. Likewise, the intellect of women had to rise in step so that they could properly analyse and recognize the intellect of potential mates, potentially during a period of human history when the females, on the whole, chose their mates.
I hypothesize, then, that the reason why so many facets of our society are plagued so harshly by politics is that it is politics for which our brains evolved, thus it is nigh impossible to separate the politics from social function. It would be interesting, then, to take another species and artificially direct its evolution to enhance its intelligence to as close to human capacity as is possible.