This is a project to speculative issue of what will people do if someday wars happen or someday there is no food on the earth. We see many news saying when putting one species in one space with no food and no water for a long time they will start killing each other for living. This seems far to human being. But in fact, this happened in china before. Rich people or officer ate babies or monkeys for pleasure and on the other side poor people sold their babies for money, mostly girls, because they think girls are not that useful as boys such as hard agriculture work. And another example is black slaves, people have unfair treatment between people.