made intellectually significant contributions to feminist theory and Marxist feminism. Russian Revolution and the Soviet Union With the October Revolution in 1917, the Bolsheviks took power from the Russian Provisional Government. The Bolsheviks established the first socialist state based on the ideas of soviet democracy and Leninism. Their newly formed federal state promised to end Russian involvement in World War I and establish a revolutionary worker's state. Following the October Revolution, the Soviet government struggled with the White Movement and several independence movements in the Russian Civil War. This period is marked by the establishment of many socialist policies and the development of new socialist ideas, mainly in the form of Marxism–Leninism. In 1919, the nascent Soviet Government established the Communist Academy and the Marx–Engels–Lenin Institute for doctrinal Marxist study and to publish official ideological and research documents for the Russian Communist Party. With Lenin's death in 1924, there was an internal struggle in the Soviet Communist movement, mainly between Joseph Stalin and Leon Trotsky, in the form of the Right Opposition and Left Opposition, respectively. These struggles were based on both sides' different interpretations of Marxist and Leninist theory based on the situation of the Soviet Union at the time. Chinese Revolution At the end of the Second Sino-Japanese War and, more widely, World War II, the Chinese Communist Revolution occurred within the context of the Chinese Civil War. The Chinese Communist Party, founded in 1921, conflicted with the Kuomintang over the country's future. Throughout the Civil War, Mao Zedong developed a theory of Marxism for the Chinese historical context. Mao found a large base of support in the peasantry as opposed to the Russian Revolution, which found its primary support in the urban centres of the Russian Empire. Some significant ideas contributed by Mao were the ideas of New Democracy, mass line and people's war. The People's Republic of China (PRC) was declared in 1949. The new socialist state was to be founded on the ideas of Marx, Engels, Lenin and Stalin. From Stalin's death until the late 1960s, there was increased conflict between China and the Soviet Union. De-Stalinization, which first began under Nikita Khrushchev, and the policy of detente, were seen as revisionist and insufficiently Marxist. This ideological confrontation spilt into a broader global crisis centred around which nation was to lead the international socialist movement. Following Mao's death and the ascendancy of Deng Xiaoping, Maoism