Joker

Anarchism-belief in the abolition of all government and the organization of society on a voluntary, cooperative basis without recourse to force or compulsion.

the belief that the government is bad and is unnecessary.

We see this when Joker is standing in the car surrounded by the rioting clowns. Showing that the government is unnecessary is just a social concept and a way for people to gain power.

Absurdism-the belief that human beings exist in a purposeless, chaotic universe.

The idea is that people live in a meaningless universe. 

We see this at the end of Joker when Joker is laughing at a joke he was thinking about and his therapist asks what the joke was, Joker then told her that she wouldn’t get it.

Existentialism-a philosophical theory or approach which emphasizes the existence of the individual person as a free and responsible agent determining their own development through acts of the will.

The idea is that we create our own meaning and purpose for our life.

We see this when

Nihilism-the belief that all values are baseless and that nothing can be known or communicated.

All values are meaningless and nothing can be known.

We see this when Joker kills his mum. 

.