Wang Mang
In 8 CE, the Han chancellor Wang Mang usurped the throne of the Han emperors and established his own dynasty, the Xin. Wang Mang wanted to restore the Han to what he believed to be the "idyllic" condition of the early Zhou. He outlawed the trading of land and slaves, and instituted numerous state monopolies. These ultra-modernist policies proved highly unpopular with the population, who overthrew and executed him in 25 CE and restored the Han dynasty.