An avant-garde movement born in the wake of Dada after the First World War, Surrealism embodies both an attitude and a group of artists and intellectuals. Transdisciplinary, it is nevertheless led by a dominant personality, that of André Breton, author of a "Manifesto of Surrealism" in 1924. According to the French writer, the surrealist approach lies in the exploration of the unconscious, whether in writing or in the arts. By this recourse to the omnipresent theme of the dream, it reactualizes the principles of symbolism.