How did Xunzi’s view of human nature differ from Mencius’s?

The disagreement between Mencius and Xunzi regarding human nature represents one of the most significant debates in early Confucianism.

• Mencius’s View: Mencius argued that human nature (xing) is inherently good. He believed that all individuals are born with "four beginnings"—the feelings of commiseration, shame, courtesy, and right and wrong—which, when properly cultivated, develop into the cardinal virtues of humanity, righteousness, decorum, and wisdom. For Mencius, moral development is a process of activating and refining this innate goodness through self-awareness and effort.12

• Xunzi’s View: Conversely, Xunzi famously claimed that "the nature of man is evil". He argued that humans are naturally prone to pursue the gratification of their passions and desires. Consequently, he rejected Mencius’s "naive moral optimism," asserting that goodness is not innate but is instead an artificial construct achieved through rigorous training, education, and the imposition of ritual (li) and social authority.34

While both philosophers agreed on the importance of self-cultivation and the perfectibility of human beings, they differed fundamentally on whether morality is an internal potential to be realized or an external discipline to be imposed.4