Also there is no consensus on what is a vital social norm. I think we can agree that common random killing sprees would perhaps fall into this. But even that in itself if surrounded by the right memetic scaffolding could be made to work (perhaps a "kill the guy you hate day" could work). Social stability and prosperity is mostly polygenic.

Kill likely to succeed AGI creators who haven't created a sane goal system (when no other means will work to stop them). Although I know Tim doesn't accept even that exception.