In a more perfect world, more countries would have ballistic missiles, but they’d only use them to send meaningful messages written on biodegradable confetti paper to the population of other nations. So, for example, on Eid al-Adha, Saudi Arabia might fire one at Dearborn, Michigan with a bunch of messages that say things like, “May peace and joy embrace your life.” Or Cheyenne, Wyoming might fire one at Tehran that says, “The United States is hosting a party in Bali from September 9-13, 2018. Everyone reading this is warmly invited.”
Then there’s the Irish. They would just continue to playfully shoot rainbows at vessels off their coast. No damage caused; it simply makes people feel good about the world.