Movement launched in Paris in 1924 by the French poet André Breton with publication of his Manifesto of Surrealism. Breton was strongly influenced by the theories of Sigmund Freud, founder of psychoanalysis. Freud identified a deep layer of the human mind where memories and our most basic instincts are stored. He called this the unconscious, since most of the time we are not aware of it. The aim of Surrealism was to reveal the unconscious and reconcile it with rational life. Surrealists did this in literature as well as art. Surrealism also aimed at social and political revolution and for a time was affiliated to the Communist party. There was no single style of Surrealist art but two broad types can be seen. These are the oneiric (dream-like) work of Dalí, early Ernst, and Magritte, and the automatism of later Ernst and Miró. Freud believed that dreams revealed the procedures of unconscious, and his famous book. The Interpretation of Dreams was central to Surrealism. Automatism was the Surrealist term for Freud's technique of free association, which he also used to reveal the unconscious mind of his patients. Surrealism had a huge influence on art, literature and cinema as well as social attitudes and behaviour.