The Spring and Autumn Warring States Period was an important period in China's history. It was also a period where the vassals competed for hegemony and wars occurred frequently. During this period, there were many famous generals and strategists who made important contributions to the development of Chinese history in different historical periods. Famous generals included: During the Spring and Autumn Period and the Warring States Period, Duke Huan of Qi used his advisor Guan Zhong to become the first overlord in Chinese history. During the Spring and Autumn Period and the Warring States Period, King Zhuang of Chu used the strategy of "shocking the world with one brilliant feat" and eventually became the first overlord in Chinese history. During the Spring and Autumn Warring States Period, the monarch of the State of Qin, Duke Mu of Qin, used his advisor, Bai Lixi, to become the first unified, central state in Chinese history. During the Warring States Period, the king of the State of Zhao, Zhao Wuling, used his advisors, Lianpo, Baiqi, and others to become the first unified, central state in Chinese history. Famous strategists included: During the Spring and Autumn Period and the Warring States Period, Xunzi proposed the view that human nature was evil and became the first philosopher in Chinese history. During the Spring and Autumn Period and the Warring States Period, Mozi put forward the ideas of "universal love" and "non-aggression" and became the first philosopher in Chinese history. During the Spring and Autumn Period and the Warring States Period, Li Si put forward the idea of Legalism and became the first politician in Chinese history. During the Spring and Autumn Period, Han Feizi put forward the idea of Legalism and became the first politician in Chinese history.