He strongly believes in egalitarianism.

Leninism is a form of communism that particularly emphasizes workers' rights.

He is a fervent communist.

He deeply believes in the principles of communism.

He is deeply studying the theory of Marxism-Leninism.

He claims to be a socialist.

He is a famous author and a person who is respected by many people.

He is known as an absolutist in politics.

He is a perfectionist, so he is very strict about his work.

My sister is a vegetarian and does not eat meat at all.