If humans are to survive for a long period they'll need to loose the trait of violence, especially with such dangerous weapons being created. Think, we have enough nukes to destroy all life on earth three times over.
Loosing the trait would be hard of course, as a pacafist would not survive through natural selection in a world of war makers. But if a society were violence (including being a soldier) was a crime, then those people would fare worse and thus die out. But how would you enforce the law without weapons?
And you may argue in any society if there is no equallity then people wil rise up against the goverment. So maybe we must first have a working comunist regime. But how do you enforce comunism without weapons?
So will this trait, which you could argue be impossible to destroy be removed? Perhaps through science?
If it was not removed, will it indefinately destroy us?
Does war set us back or make technological advances faster (think of those that have died, but also inventions such as raydar)?