For example if you drop a baby off in the deep wilderness and do absolutely nothing to raise him, he will turn out evil.
http://en.wikipedia.org/wiki/Feral_child
Sorry, but feral children do not turn out evil.

Basicly the baby would have to do anything it needed to survive and so it would learn to be evil in order to live.
Feral children are not evil.

If the baby grows up in a good family, it will be a good person, not because the family molds him to be good, but because its the natural way for things to work.
Their are many factors that make people good, not just family. If you live in a violent family or live with a greedy family it does not mean you will turn out greedy. A good example was Hitler he lived with a normal family and he turned out evil, however his farther was a good person and his mother.

Again, goodness is complex and involves many factors.

People naturally want to survive, they will do anything to survive.
Not really. Again, people do sacrifice their lives to help save people. For example on Newnight(BBC news) they had a story about a old man risking his life to save a young girl. And the evolutionary biologist says that we have evolved past just thinking about ourselves and our own survival. Funny enough most people who sacrifice their lives say they think about their own family(the person in that case said he thought about his daughter when she was young). Another example is suicide bombers, note sucide bombers have the same motivitaion as people who sacrifice their lives i.e. a sense of belonging and family.