Comment by timfsu

If someone ever invented a gun that is guaranteed to never fire when pointed at a human, assuming the safeguards were non-trivial to bypass, that would certainly improve gun violence, in the same way that a fingerprint lock reduces gun violence - you don't need to wait for 100% safety to make things safer. The government would then put restrictions on unsafe guns, and you'd see less of them around.

It wouldn't prevent war between nation-states, but that's a separate problem to solve - the solutions to war are orthogonal to the solutions to individual gun violence, and both are worthy of being addressed.