摘要：To study the human nature is the most important project for human knowing themselves. Human being has thought and probed into the problem of human nature since the naissance. Unfortunately, although modern human has already achieved great processes and marvelous successes in natural science, the recognition to human nature is superficial. All descriptions about human nature past and now focus on the surface of the problem instead of the essence. This paper points out the puzzle of human nature. By analyzing and illustrating the characteristics of human nature, this paper chiefly discusses the social effect of human nature in perspective of politics and laws. Finally, this paper examines the real world with defects, where the common human nature is ignorant.
