The heritability of narcissistic traits can reach several dozen percent, but environmental factors, especially parenting style, family dynamics, and early social experiences, are equally important.

Definition of Narcissism - What Is It and How to Recognize It? Narcissism is a psychological concept describing a pattern of thinking and behavior characterized by an inflated sense of self-importance, constant need for admiration, and lack of empathy for others. While in everyday language the term “narcissist” often refers to someone self-centered, in psychology it carries a much deeper meaning.

Narc and Co's guide to the narcissistic abuse cycle and how to break it.