Libel actions, when we look at them in perspective, are an ornament of a civilized society. They have replaced, after all, at least in most cases, a resort to weapons in defense of a reputation. ↗
Building walls isn't going to work in the long run. Some people are happy with the wall in Israel, but somebody will get a weapon someday and knock it over or something. Walls aren't the answer between countries, though. ↗
As a first step there must be an offer to achieve equality of rights in disarmament by abolishing the weapons forbidden to the Central Powers by the Peace Treaties. ↗
What has kept the world safe from the bomb since 1945 has not been deterrence, in the sense of fear of specific weapons, so much as it's been memory. The memory of what happened at Hiroshima. ↗