Stephen Fry explains existentialism in two minutes, for BBC Radio 4:
The existentialist Jean-Paul Sartre thought that human beings live in anguish. Not because life is terrible. But rather because, we’re ‘condemned to be free’. We’re ‘thrown’ into existence, become aware of ourselves, and have to make choices. Even deciding not to choose is a choice. According to Sartre, every choice reveals what we think a human being should be.