Depending on the country who developed it, the risk of nuclear war could go up.
If I don’t have to worry about nuclear retaliation, maybe I’m very confident in engaging in war. After all, my nukes will still work, and everyone else’s won’t.
If the technology is shared equally to all countries at the same time, the risk of conventional war could go up.
Imagine the nuclear armed countries who are enemies of another nation with a bigger military. North Korea vs USA, Pakistan vs India. In these cases, nuclear weapons are a deterrence against the stronger opponent. Without this, the country with a stronger conventional force may be more likely to they think they’ll win a war unscathed.
Probably more war:
If I don’t have to worry about nuclear retaliation, maybe I’m very confident in engaging in war. After all, my nukes will still work, and everyone else’s won’t.
Imagine the nuclear armed countries who are enemies of another nation with a bigger military. North Korea vs USA, Pakistan vs India. In these cases, nuclear weapons are a deterrence against the stronger opponent. Without this, the country with a stronger conventional force may be more likely to they think they’ll win a war unscathed.