The suffix of Zi in ancient China was a respectful way of addressing a sagely writer, for instance, Kong Zi (Confucius), Meng Zi (Mencius), etc. Zi is an honorable way of addressing a sagely writer. Mo Zi (470-391BC) was another great thinker in Chinese history. 

In ancient China, Mohism was an influential philosophical, social, and religious movement that flourished during the Warring States era (479-221BC). Mohism originates in the teachings of Mo Di, or Mo Zi, from whom it takes its name.

Mo Zi, or Mo Di, with his followers initiated philosophical argumentation and debate in China. They formulated China's first explicit ethical and political theories and advanced the world's earliest form of consequentialism, a remarkably sophisticated version based on a plurality of intrinsic goods taken as constitutive of human welfare.

Central elements of Mohist thought include "all men are equal before God" and that mankind should follow heaven by practicing universal love. Advocating that all action must be utilitarian, Mo Zi condemned the Confucian emphasis on ritual and music. He regarded warfare as wasteful and advocated pacificism. Mo Zi also believed that unity of thought and action was necessary to achieve social goals. Although Moism failed to establish itself as a major school of thought, its views are said to be "strongly echoed" in Legalist thought.