- a movement in philosophy and literature that emphasises individual existence, freedom and choice
-based on the view that humans define their own meaning in life, and try to make rational decisions despite existing in an irrational universe
-focuses on the question of human existence, and that there is no purpose or explanation at the core of existence.
-as there is no God or any other transcendent force, the only way to counter this nothingness is by embracing existence
-the two World Wars are often said to have caused a rise in this, due to the scale of violence and evil that occurred which people struggle to make sense of.