"Conservatives tend to exhibit less support for egalitarian policies and generally oppose legislation granting the government the authority to regulate power and resource differences. This political stance reflects male reproductive psychology, for in terms of fitness men have much more to gain from unequal resource distribution than do women, who have more to gain by resource sharing. This is not to say that all egalitarians are women or that those who prefer dominance hierarchies are only men—they are not. But there is a monumental tilt among males toward inequity, and this tilt is rooted in evolution."
(From: Hector A. Garcia: Sex, Power, and Partisanship: How Evolutionary Science Makes Sense of Our Political Divide )
I’m not sure the tilt is all that monumental. Remember that 52% of White women voted for Donald Trump.
This does not take in to account the fact that there is a big difference between what goes on in the board room and what goes on in the bedroom. More cerebral activities such as business and governing (while certainly competative in their own way) require a communal effort in order to ultimately be successful over a long period of time. Activities such as dating and mating, which are dominated by the lower functioning aspects of the human brain, thrive in an authoritarian, hierarchical environment where the strongest, most aggressive males are able to attract the most desirable females.
Some conservatives ultimately fail to be leaders in a communal environment because they are not able to recognize this distinction. They may find success over a short period of time, riding their aggressive and authoritarian posturing to short term gains, but they soon find that the community bands against them and destroys them if their antics become too pronounced and too damaging to the society as a whole.
The author's discertation is correct, but incomplete. This is only a partial quote, so I'm not sure if they eventually delved deeper in to the subject in their essay, so I just wanted to create this addendum as clarification.
Those elite breeding males might not be the ones sitting in board rooms or offices. They could be be farmers, practitioners of various sorts, commercial fishermen, entrepreneurs, athletes, construction workers, or just about anything else. They could even be drug lords.