Many people think of in terms of reasoning and thinking skills, but a broader definition is that it is an all-purpose ability to do well on cognitive tasks, to solve problems, and to learn from experience.

I think the word you're looking for is intelligence

it is the nurture that decides the behavior of a child.

explanation:

naturally, children are pure. it is an environment and the type of attention a child gets that determines their behavior.  

it exposes the hypocrisy of religion and christian supporters of slavery