Anti-fascism is the opposition to fascist ideologies, organizations, governments and people. Anti-fascism started in Europe in the 1920s. At the same time, fascist political parties were getting popular in Europe. Anti-fascism was most popular during and after World War II, when fascist governments were very powerful in Europe. Many different kinds of political parties have believed in anti-fascism. Some of these parties have been Marxist, nationalist, anarchist, socialist, pacifist, social democratic, conservative, and liberal.