The third characteristic is termed “splitting”, where the world is experienced in terms of two rigid categories – either Good or Bad – with no areas of grey. As long as others are meeting the narcissist’s need for supply, they are Good, and they find themselves idealised and showered with reciprocal positive affirmation – a process called “love-bombing”. However, if someone criticises or questions the narcissist’s false self, that person becomes Bad, and is subjected to implacable hostility.
It is not known for certain what triggers the disorder. There is likely to be a genetic component, but in many cases early life experiences are the primary cause. Narcissism is a natural phase of child development (as the parents of many teenagers will testify) and its persistence as adult NPD frequently reflects chronic trauma during childhood. Paradoxically for a condition that often manifests as apparent egotism, all NPD sufferers have virtually non-existent self-esteem. This may arise from ongoing emotional neglect on the part of parents or caregivers, or from sustained psychological or sexual abuse.
The common factor is a failure in the development of a healthy sense of self-worth. It is likely that narcissism becomes entrenched as a defence against the deep-seated shame associated with these experiences of being unworthy and valueless.