French composer Darius Milhaud (1892-1974), a member of Les Six, was influenced by American jazz and popular Brazilian music: ragtime, maxixe, samba, and tango. He was a proponent of polytonality and one of the most prolific composers of the century. He wrote more than 400 works, including 14 concertos, 18 string quartets, 8 operas, 10 ballets, 7 cantatas, 14 sonatas, 8 symphonies, and other works.