Existentialism: Existentialism is a philosophical belief that emphasizes individual existence, freedom, and responsibility in an absurd or meaningless world.
Absurdism: Absurdism is a philosophy that highlights the inherent conflict between human desire for meaning and purpose in life and the universe's lack of inherent meaning or purpose.
Alienation: Alienation refers to feelings of isolation, detachment, or estrangement from oneself, others, or society.