Colin Wilson was known for writing about diverse subjects like crime, human consciousness, and existentialism in a way that was ambitious but also attracted harsh criticism. His first major work, The Outsider, analyzed philosophical and psychological alienation in the 20th century and won him fame, but subsequent works faced backlash. Wilson believed existentialism had gone wrong since Heidegger and sought to build a new, more optimistic type of existentialism focused on reaching higher states of consciousness through mental discipline rather than drugs or illusion. Though controversial, Wilson's works provide evidence that his revolutionary philosophical ideas deserve more appreciation and study.