El Lissitzky was a Russian artist, designer, photographer, teacher, typographer, and architect. He was one of the most important figures of the Russian avant-garde, helping develop suprematism with his friend and mentor, Kazimir Malevich, and designed numerous exhibition displays and propaganda works for the former Soviet Union. Lissitzky's work greatly influenced the Bauhaus, Constructivist, and De Stijl movements and experimented with production techniques and stylistic devices that would go on to dominate 20th century graphic design. His entire career was laced with the belief that the artist could be an agent for change, later summarized with his edict, "das zielbewußte Schaffen" (The task-oriented creation). In 1941 he produced one of his last known works — a Soviet propaganda poster rallying the people to construct more tanks for the fight against Nazi Germany.