On Contradiction is a 1937 essay by the Chinese Communist revolutionary Mao Zedong. Along with On Practice, it forms the philosophical underpinnings of the political ideology that would later become Maoism. It was written in August 1937, as an interpretation of the philosophy of dialectical materialism, while Mao was at his guerrilla base in Yan'an. Mao suggests that all movement and life is a res... Wikipedia