Actually,it is not difficult to understand why ancient rulers behaved in this manner. In primeval times,tribal chiefs and their members had to resort to power to ensure the survival of their whole community.

• 这一点，我们还可以从原始氏族首领和其成员的首要任务和崇高义务，就是维护自己血缘氏族的生存利益中一目了然。