The effects of the First World War display two different outcomes of the armed conflict in Pablo Picasso and Sigmund Freud. Both of them renew their work taking mythology as their Denkraum, or thinking space. Picasso begins his so-called neo-classical period in which he creates many images inspired by Antiquity, and Freud takes an epistemological turn, introducing the Realitätsprinzip, or reality principle, using elements of Greek mythology like Eros, associated with the life instinct and the pleasure principle, and Thanatos, associated with the death instinct and the reality principle.