Sartrean Existentialism

Sartrean Existentialism, also known as Jean-Paul Sartre Thought is a philosophy based on Jean-Paul Sartre. Every human tool is made with given essential. Chair for example, is made with essential, to make people sit on it. Human, however is not made with given essential, thus existence precedes essence. Human who has no essential must choose and act according to his own preference, which would later make his own new identity.

Sartre was an atheist and an anarchist, and claimed to be marxist, even though there's no evidence that he actually read Marx.