A weapon that eliminates large swaths of the population while not touching the army has natural strategic limits. Recall that eliminating six million Jews did not make them peaceful at all. In fact it produced a warrior generation with teeth.
Warfare is obsolete. It is obsolete not because we cannot wage it but because there is no benefit to those fighting it or to the nation using it. You can no longer keep the lands and the lands are of negligible value without the support of the people who will never support an invader. Thus the true source of wealth has moved properly from land and their land slaves to people themselves. Warfare itself has become a source of wealth because it allows an elite to spend massive amounts of fiat currency while enriching themselves in the process.
Transition that infrastructure to peaceful ends while expanding the scale of its operations is the true public policy challenge facing mankind. It is no trick at all to homogenize the base economy globally as it is largely happening anyway in a messy way. Poverty can disappear and the majority of the population can focus on terraforming Terra while optimizing human development.
The super economy emerging from the military dream can tackle human expansion underground, the deep sea and Space while enriching knowledge and humanity.
Nuclear experimentation belongs firmly in the lab. There is scant economic value in most of that technology and yes it is dangerous and an ongoing problem.
Nuclear Experimentation Year 70: Playing With Madness