In physics, it is important to calculate the center of mass of an object.

He is majoring in political science at university.

I think he is a competent politician.

Aristocracy was a major form of politics in medieval Europe.

He is deeply interested in political issues.

His country is ruled by autocracy.

He is an activist who opposes dictatorship.

Plutocracy is creating social inequality.

He was imprisoned as a political offender.

Ochlocracy is a form of government where the majority of people rule.