Sorai wrote many influential works where he showed what he thought were the two basic problems of the philosophy of Song Confucianism. The first was with the bakufu-domain system, which by the eighteenth century was in trouble. Sorai doubted that it was enough that each person wanted to find their ethical good. He argued that solving the political crisis of the time required more than perfecting moral character. He also saw that the Chinese sage kings were not only concerned with morality, but also with government itself. The second point where Sorai disagreed with Song Confucianism was that he felt it was putting too much emphasis on morality and that it repressed human nature, because human nature was based on emotion.