Confucius (孔子; pinyin: Kǒngzǐ; lit. 'Master Kong'; c. 551 – c. 479 BCE), born Kong Qiu (孔丘), was a Chinese philosopher of the Spring and Autumn period who is traditionally considered the paragon of Chinese sages, as well as the first teacher in China to advocate for mass education. Much of the shared cultural heritage of the Sinosphere originates in the philosophy and teachings of Confucius. His philosophical teachings, called Confucianism, emphasized personal and governmental morality, harmonious social relationships, righteousness, kindness, sincerity, and a ruler's responsibilities to lead by virtue.

Confucius considered himself a transmitter for the values of earlier periods which he claimed had been abandoned in his time. He advocated for filial piety, endorsing strong family loyalty, ancestor veneration, the respect of elders by their children and of husbands by their wives. Confucius recommended a robust family unit as the cornerstone for an ideal government. He championed the Silver Rule, or a negative form of the Golden Rule, advising, "Do not do unto others what you do not want done to yourself."

The time of Confucius's life saw a rich diversity of thought, and was a formative period in China's intellectual history. His ideas gained in prominence during the Warring States period, but experienced setback immediately following the Qin conquest. Under Emperor Wu of Han, Confucius's ideas received official sanction, with affiliated works becoming mandatory readings for career paths leading to officialdom. During the Tang and Song dynasties, Confucianism developed into a system known in the West as Neo-Confucianism, and later as New Confucianism.