Anarcho-communism
Some well-known anarcho-communist writers are Peter Kropotkin, Ricardo Flores Magón and Nestor Makhno. Anarcho-communism is opposed to the more authoritarian forms of communism advocated by Leninists and Maoists. These groups have violently clashed in Russia, Korea and Spain over their beliefs. Some examples of anarcho-communism in practice include the Free Territory of Ukraine, Shinmin Autonomous Region, and the  Revolutionary Spain.