societal change than those of Dada, as led by Tzara, who was now among their rivals. Breton's group grew to include writers and artists from various media such as Paul Éluard, Benjamin Péret, René Crevel, Robert Desnos, Jacques Baron, Max Morise, Pierre Naville, Roger Vitrac, Gala Éluard, Max Ernst, Salvador Dalí, Luis Buñuel, Man Ray, Hans Arp, Georges Malkine, Michel Leiris, Georges Limbour, Antonin Artaud, Raymond Queneau, André Masson, Joan Miró, Marcel Duchamp, Jacques Prévert, and Yves Tanguy. As they developed their philosophy, they believed that Surrealism would advocate the idea that ordinary and depictive expressions are vital and important, but that the sense of their arrangement must be open to the full range of imagination according to the Hegelian Dialectic. They also looked to the Marxist dialectic and the work of such theorists as Walter Benjamin and Herbert Marcuse. Freud's work with free association, dream analysis, and the unconscious was of utmost importance to the Surrealists in developing methods to liberate imagination. They embraced idiosyncrasy, while rejecting the idea of an underlying madness. As Dalí later proclaimed, "There is only one difference between a madman and me. I am not mad." Beside the use of dream analysis, they emphasized that "one could combine inside the same frame, elements not normally found together to produce illogical and startling effects." Breton included the idea of the startling juxtapositions in his 1924 manifesto, taking it in turn from a 1918 essay by poet Pierre Reverdy, which said: "a juxtaposition of two more or less distant realities. The more the relationship between the two juxtaposed realities is distant and true, the stronger the image will be−the greater its emotional power and poetic reality." The group aimed to revolutionize human experience, in its personal, cultural, social, and political aspects. They wanted to free people from false rationality, and restrictive customs and structures. Breton proclaimed that the true aim of Surrealism was "long live the social revolution, and it alone!" To this goal, at various times Surrealists aligned with communism and anarchism. In 1924 two Surrealist factions declared their philosophy in two separate Surrealist Manifestos. That same year the Bureau of Surrealist Research was established and began publishing the journal La Révolution surréaliste. Surrealist Manifestos Leading up to 1924, two rival surrealist groups had formed. Each group claimed to be successors of a revolution launched by Apollinaire. One group, led by Yvan Goll, consisted of