Mao Zedong was a revolutionary leader who established communist rule in China and served as the first Chairman of the People's Republic of China from its establishment in 1949 until his death in 1976. As chairman, Mao launched controversial campaigns like the Great Leap Forward and the Cultural Revolution that had disastrous economic and social consequences but aimed to solidify his power and communist ideology. Mao's rule transformed China's government and society but also led to widespread violence, oppression, and millions of deaths under his authoritarian leadership before his death ended his dictatorship.