The way most government handle power that is giving to them by the people has made politics looks like a cause instead of a blessing, because the people don't even see the dividend of politics.
The survival of the fittest is still going on, but instead of the survival of the physically toughest one, it's the survival of the most manipulative ones. Physical strength was replaced by cognitive capacity.
Both models could work greatly if physical strength was used for loyal purposes, the same way if cognitive capacity was also used for noble reasons. However, in this world, everything is doomed to failure due to the perverted nature of human beings. The more humans climb up on social hierarchy, more they resign to their corrupt tendencies. As consequence, you have the highest power positions contaminated by the worst scum of individuals walking on this earth.
Actually, you don't even have to go too far. Think on minor examples, like the mayor of your city, the principal of the local university or the religious leader of the church. Politics is in every institutions, and where it reaches, a trail of rottenness is left behind.