Following the Xinhai Revolution in 1911 and the end of the Qing Dynasty, the May Fourth Movement sought to completely abolish the old imperial institutions and practices of China (such as the old civil service system). There were two major philosophical trends during this period. One was anti-traditional and promoted Western learning and ideas. A key figure of this anti-traditional current was Yan Fu (1853–1921) who translated various Western philosophical works including Smith's The Wealth of Nations and Mill's On Liberty. There were also attempts to incorporate Western ideas of democracy, and republicanism into Chinese political philosophy, notably by Sun Yat-Sen (1866–1925) at the beginning of the 20th century. Another influential modern Chinese philosopher was Hu Shih, who was a student of John Dewey at Columbia University and who promoted a form of pragmatism.