Narcissism has existed for as long as humanity has, and has been acknowledged for as long. The word derives from the Greek mythology narrative of Narcissus, which dates back to at least 8 A.D. The official diagnosis is based on psychoanalytic thought, which began with Freud but has since evolved with different schools of psychology recognizing somewhat differing understandings of the personality disorder. A personality disorder affects how a person thinks, behaves, and interacts with others.
Narcissism (or egoism) is characterized by a proclivity to act in a self-centered manner. Genuine care for the feelings and needs of others is nearly non-existent. Instead, narcissistic people appear to regard other people as nothing more than objects to be manipulated.
Narcissism definition
What is narcissism?
Narcissistic people do not necessarily suffer from a mental disease. Narcissism could be either a caracter or a mental disorder, depending on where the symptoms of narcissism are positioned on the narcissism spectrum.