If you will being born with something that you're oversensitive with your temperament or if you have parents that you are seeing them manipulate with their behavior, other parents or peers. And also, again, praising for good behaviors and over praising for good behaviors and over criticizing for bad behaviors are all things that they have seen can develop into NPD. Basically, as one person called it, inadequate warmth, approval and excessive idolization. So you don't accept your child for who they are