3 links have been added on this idea.
  1. This idea isn’t really as good as it’s cracked up to be — read on.
    https://www.britannica.com/topic/existentialism/Problems-of-existentialist-philosophy

  2. Munch

    Its one of those ideas that came way later than you would have expected – Kierkegaard was many things: philosopher, religious writer, satirist, psychologist, journalist, literary critic and generally considered the ‘father’ of existentialism.