Surrealist concepts and interests often aligned with the ideas of the political left of the time and so Maar became very politically active at this point in her life. After the fascist demonstrations of 6 February 1934, in Paris along with René Lefeuvre, Jacques Soustelle, supported by Simone Weil and Georges Bataille, she signed the tract "Appeal to the Struggle" written at the initiative of André Breton. Much of her work is highly influenced by leftist politics of the time, often depicting those who had been thrown into poverty by the Depression. She was part of an ultra-leftist association called “Masses”, where she first met Georges Bataille, an anti-fascist organization called the Union of Intellectuals Against Fascism, and a radical collective of left-wing actors and writers called October.