The famous British naturalist Charles Darwin, evolution pioneer in his diary records, he had a "stupid".
In the middle of the nineteenth century, Darwin travel around the world. Once, he came to Africa's a primitive tribes, where people live cave, eat the grass roots, fruit of the RuMaoYinXie primitive life. Darwin lived there for a few days, a startling discovery: when the weather, people can't find food, they will old man points and the sick. Reason is, be eaten all is considered no use (lose labor ability). Darwin is sorrowful: the world has into civilization times, and the people here are so brutal cruel, something must be done to reform them. He pay handsomely for a local baby boy, take him back to England, he will use modern civilization education mode, make this African ancestry child into a "Christian". And then, with the "civilized men" to remake his people back about the original eat people present situation. Sixteen years later, the little boy grew up and became "youth civilization", Darwin's help, put the acquaintance him back to Africa.
A year later, Darwin came to Africa, want to see after 17 years the primitive tribes have DuoDa progress. But, but he couldn't find the "youth civilization". The local people tell him, the youth and ate it. Darwin surprised: "so good, why to eat?" "He what all don't understand, what all can't do, leave have what use?"
Darwin though a great evolutionist, but at least he broke the evolution of the rule: one person eat people the primitive tribes in the short period, want to let them into highly civilized society, it is not realistic; From barbarity evolution to civilization, which is bound to experience a long and painful process, this is not on a single or a few "civilized men" can transform.
Human evolution is such, nay, other things might it not so??