he wrote many powerful pieces critical of imperialism and supportive of internationalism. His writings and talks over his last decade revealed a deep understanding of developments in India, China, Africa, Asia, the Islamic world, and the Caribbean. Harrison repeatedly began his analysis of contemporary situations from an international perspective. Though a strong advocate of armed self-defense for African Americans, he also praised the mass-based non-violent efforts of Mohandas K. Gandhi. The Garvey Movement In January 1920 Harrison became principal editor of the Negro World, the newspaper of Marcus Garvey's Universal Negro Improvement Association (UNIA). Over the next eight months, he developed it into the leading race-conscious, radical and literary publication of the day. By the August 1920 UNIA convention, Harrison had grown increasingly critical of Garvey. Harrison criticized Garvey for exaggerations, financial schemes, and desire for empire. In contrast to Garvey, Harrison emphasized that African Americans' principal struggle was in the United States, not in Africa. Harrison did however contribute to the UNIA's 1920 "Declaration of the Negro Peoples of the World". Though Harrison continued to write for the Negro World into 1922, he looked to develop political alternatives to Garvey. Later years In the 1920s, after breaking with Garvey, Harrison continued public speaking, writing, and organizing. He lectured on politics history, science, literature, social sciences, international affairs, and the arts for the New York City Board of Education, and was one of the first to use radio to discuss topics in which he had expertise. In early July 1923, he spoke on "The Negro and The Nation" over New York station WEAF. His book and theater reviews and other writings appeared in many of the leading periodicals of the day—including The New York Times, New York Tribune, Pittsburgh Courier, Chicago Defender, Amsterdam News, New York World, Nation, New Republic, Modern Quarterly, Boston Chronicle, and Opportunity magazine. He openly criticized the Ku Klux Klan and the racist attacks of the "Tulsa Race Riot" of 1921. He worked with various groups, including the Virgin Island Congressional Council, the Democratic Party, the Farmer-Labor Party, the single tax movement inspired by Henry George, the American Friends Service Committee, the Urban League, the American Negro Labor Congress, and the Workers (Communist) Party (the name at that time of the Communist Party USA). In 1924 Harrison founded the International Colored Unity League (ICUL), which was his most broadly unitary effort. The ICUL urged Black people