Final answer:
The Qin Dynasty in China ruled through Legalism, a philosophy that used uniform laws and codes to reform and strengthen rulers.
Step-by-step explanation:
The Qin Dynasty in China ruled through the philosophy of Legalism. Legalism was a school of thought that emphasized the use of uniform laws and codes to reform and strengthen rulers. Under the rule of Qin Shi Huang, the first emperor of China, Legalism fostered unity by standardizing the writing system, coins, and the law, and by appointing officials to govern on the emperor's behalf.