I hated I
Huckabees, though I expected to love it. I don’t think it had anything to do with existentialism, it was just mocking self-help gurus who like to appropriate terms from the intellectual and scientific culture and turn them into pop psychology.
Existentialism is a school of that branch of philosophy that deals with questions of meaning, what we might call the great mysteries of life, the universe, and everything (Douglas Adams was much more existentialist than I
Huckabees, IMO): What is the meaning of life? What is the purpose of history? What does it mean to be good?
Previous philosophers often tried to answer these questions by getting at the “essence” of things - the true nature of things apart from their mere accidents. To find out what it means to be good, one had to identify the true nature of humanity, for example. Once you knew what it really means to be human, you could figure out how to be a good one. Answers included that to be human is to be rational, or to be free, or to be in society, or to be a true reflection of the divine.
Existentialism was a reaction against all this. There were no big, universal answers out there that philosophers could discover like scientists uncovering the true nature of reality. There is no “true nature” of reality, just reality, which is what we deal with every day. We aren’t born with a purpose or a destiny or a true nature we have to find, we’re just born, and then we drive ourselves mad looking for the meaning and the narrative.
Existentialism differs from nihilism in that nihilism denies that meaning and narrative exist. Existentialism says that they are real, but they are artifacts of life that come later, after the fact. Martin Luther King didn’t achieve many things because he was a great man, existentialists would say, he was a great man because he achieved many things, things that we can only recognize now that he has achieved them. Morality, courage, wisdom, strength, and the opposites of these are not “things” or “qualities” we possess in our “hearts” or in our “souls” or in some abstract realm and which guide our actions. Our actions come first; those words are judgments we or others apply to them.
Existentialism can seem bleak because there are no correct answers, no guiding forces with which to align ourselves, no way to “get it right.” There are no excuses. You can’t say that you were just following orders and following orders is always right, because nothing is right in and of itself - we can only judge things by our own standards and with what we know.