Mohism or Moism (Chinese: 墨家; pinyin: Mòjiā; lit. 'School of Mo') was an ancient Chinese philosophy of logic, rational thought and science developed by the academic scholars who studied under the ancient Chinese philosopher Mozi (c. 470 BC – c. 391 BC) and embodied in an eponymous book: the Mozi. It evolved at about the same time as Confucianism, Taoism and Legalism, and was one of the four main philosophic schools from around 770–221 BC (during the Spring and Autumn and Warring States periods). During that time, Mohism was seen as a major rival to Confucianism. Although its influence endured, Mohism all but disappeared as an independent school of thought. Among its major tenets were impartial caring, altruism and universal love for all people regardless of relations or affiliations. The ideology also stressed the virtues of austerity and utilitarianism.

Birth places of notable Chinese philosophers from Hundred Schools of Thought in Zhou Dynasty. Philosophers of Mohism are marked by triangles in blue.