Wang Fuzhi thought that the Song Dynasty's "unification of the world" could last for a hundred years only out of fear, because he was afraid of losing the world, so he "did not dare to rob people far away by force ... did not dare to treat the elderly with punishment ... did not dare to despise Confucianism with wisdom ... did not dare to supervise officials and people with harsh laws". As a result, the Song Dynasty not only lasted for a hundred years, but also surpassed the Han and Tang Dynasties in culture.