Im amazed no-one responded to the casual inclusion of Jesus in your example list! (unless I missed it)

We could quite easily have lived without a terrorist who created a popular cult. Most benefits to society that people would attribute to Jesus were due to Roman society.
(Any claim of Jesus improving earth's morality status cannot be humoured)

I would say that all Jesus caused were wars and conflict. Explosions of religion no doubt retarded scientific thinking.

Maybe a new thread could be started, listing people we could have really done without?