I mean there are some options for dealing with that.

A. Early monitoring in childhood followed by extensive therapy

B. Eugenics if a genetic link is identified (least savory option and likely not possible)

C. Rebuild our social circles and communities

To expand on C, I think a lot of what you're identifying as narcissistic behavior or sociopathy is actually caused by the destruction of our communities. The way our society is built it rewards anti-social action with money and it's cold and depersonalized. It's easy as a upper executive to fire 500 people you've never once met and you will never meet. You don't have to know them beyond a few spreadsheets of data. People will absolve themselves of personal responsibility and refer to the financial aspects. Additionally, our communities have been destroyed. The addition of the nuclear family structure encourages you to provide as much as possible to as few individuals instead of valuing extended family and community. Plus in some places in the world it is possible to go days or weeks without ever interacting with members of your community.