Legalism was the third major philosophy which was based on the teachings of Hanfeizi, he lived from 280 to 233 B.C.E. in the warring states period and the Zhou dynasty.
Hanfeizi established strict laws with either rewards for good behavior or harsh punishments for bad behavior. Peasants were watched carefully for doing a poor job. If anyone was heard criticizing the government, they would be banished to China's far northern frontier.
Hanfeizi taught that rulers should not trust any one, not even their own families. Hanfeizi wrote, "He who trusts others will be controlled by others."
At the end of the warring states period, the emperor Qin (Chin) admired the writings of Hanfeizi, so they adopted strict Legalism ideas. Many citizens were put to death for disloyalty and other crimes during the rule of the Qin dynasty.