Actual narcissism is a psychological condition that not that many people have. It can have biological causes or it is thought to be triggered by traumatic events especially in early life. It can have severely negative effects on the people with narcissism and their surroundings.
I wouldn’t say capitalist society is feeling narcissism per se more than it is fueling extreme individualism, which is still different from narcissism.
Needs another layer with an orbital laser from space saying ‘Posadism’