A major event that greatly influenced the development of fascism was the October Revolution of 1917, in which Bolshevik communists led by Vladimir Lenin seized power in Russia. The revolution in Russia gave rise to a fear of communism among the elites and among society at large in several European countries, and fascist movements gained support by presenting themselves as a radical anti-communist political force. Anti-communism was also an expression of fascist anti-universalism, as communism insisted on international working class unity while fascism insisted on national interests. In addition, fascist anti-communism was linked to anti-Semitism and even anti-capitalism, because many fascists believed that communism and capitalism were both Jewish creations meant to undermine nation-states. The Nazis advocated the conspiracy theory that Jewish communists were working together with Jewish finance capital against Germany. After World War I, fascists have commonly campaigned on anti-Marxist agendas.