Is he nature of the human good when he was born

Well.. it depends on how you see it. From the religion and humanist point of view, people are basicly a good person, and they are good until they got something bad influence their principal. But from the Freudian point of view, the basic human instinct is ths id which is bad. All human is bad when they're born and they could be good when they have the superego as their limitation of self-satisfaction seeking.