Human being is a product of the consecutively evolutional process which involves countless times of genetic transformation.The irresistible process has never been interrupted since the earth came into being 4.5 billion years ago.Subject to environmental factors and going through stochastic mutation, the evolu-tional process finally develops into a more adaptive system, therefore ensure the continuity.ln the animal world, the system results in the evolution of more advanced species and reaches its peak in the haman be-ing,for human beings have acquired the ability of innovative thinking.I think this indicates the evolution has entered into a very key stage , enabling a species to be capable of mastering its fate for the first time. The ability of innovative thinking greatly accelarateds the speed of natural evolution,which brings about great achievements in human civilization,such as art,literature,medicine,technology,especially in science which symbolizes the forefront of the expansion of human intelligence. However, it is such scientific advancements that enable humans to earn capacity of self-destruction,and cause the development of tools for self-destruction.