We need to remember that diagnosis is a science and therefore not perfect. Npd today could be a trait in a few years, if DSM editors are for that. It's important to keep front of mind the fact that we live an a society that is uncomfortable with calling people depraved or bad, unless of course they have a certain complexion or pedigree ( but that's for another thread), so it occasionally pathologizes basic human traits in an effort to explain why certain people do the things they do. I'd be interested to see a breakdown of what a person diagnosed with npd generally looks like.