Oversimplified theory of politics:

Theocracy: What if the people who know our regional religion best were in charge of everything? God would never allow frauds and hypocrites to take positions of power.

Feudal Caste System: One tribe of people got to be in charge of everything, another tribe was the slaves, and everyone else was between these two extremes.

Imperialism: Let us, as a society, go to other lands and steal stuff and people that will (probably) benefit everyone back home. And if people try to stop us, we kill them.

Democracy: What if the people who promised the nicest things to the most number of people were put in charge, by the people? Surely, this will not result in a new caste of incompetent rulers.

Capitalism: What if the people who were best at imperialism got to be in charge, rather than because they were in the ruling tribe? Surely this will not result in a new incompetent ruling caste.

Anarchism: The tribes thing would have worked if some tribes hadn't taken charge. Let's try that again but we discourage the accumulation of power.

Communism: What if we did Imperialism to the rich people in our own country? Surely, that would fix our problems and not result in a new ruling caste.

Fascism: What if we did Imperialism to poor people, people we don't like, and ethnic minorities everywhere? Surely, that would fix our problems because those people are actually secretly rich so we can steal their treasure and use it to pay for everything.