Nothing has had as large an impact on the maintenance of relative peace, at least between large/nuclear nations, as the atomic bomb. It's the MAD principle - mutually assured destruction. I think our discovery of nukes is actually pretty cool.
My first thought was that they ought to have a monument to the Rosenbergs (https://en.wikipedia.org/wiki/Julius_and_Ethel_Rosenberg), if that is the approach they're taking.
Those who advocate nuclear disarmament are basically advocating a return to increasingly-bloody world wars every few years.
Of course, it's also true that the leaders who are afraid to confront each other directly are more likely to resort to proxy wars that cause massive pain and suffering in their own right. But that's a different problem that will have to be solved by different means.