What happened
A class of scholars known as shi traveled between competing states, debating how state and society should be ordered. The major schools were Confucianism (Confucius, Mencius, Xunzi), Daoism (Laozi, Zhuangzi), Legalism (Shang Yang, Han Fei), and Mohism (Mozi); Sunzi’s Art of War also dates to this era.
Background
Zhou royal authority had collapsed, leaving competing states to seek advantage over one another. Their rulers recruited traveling advisers, creating unprecedented demand for the scholars’ ideas.
Consequences
These debates laid the foundations of Chinese thought. Legalism powered the rise of Qin, while Confucianism later became the state ideology of the Han.