The DSM is a manual that, as I stated earlier, once listed homosexuality as a mental disorder. Its versions are very much influenced by the prevailing social norms and mores in existence at the time of their publish. NPD is not a disorder but a trait, in my opinion. It isn't crippling and doesn't prevent one from working. It certainly should be addressed and treated but we need to stop focusing so much attention on understanding the minds of narcissists because it only enables and does very little in the way of progress. It also situates narcissists as exceptional and they're not. Today, they're quite the norm. See teens and adults alike taking selfies at car crash sites rather than calling the police or offering help to victims for evidence. Conversely, sociopathy is concerning and worthy of all the pearl clutching and paranoia that it gets.