I've seen this come up a few times and let me explain why this is not a good idea. Excluding MAD theory, if you're the United States, or the UK, or France, or w

I've seen this come up a few times and let me explain why this is not a good idea. Excluding MAD theory, if you're the United States, or the UK, or France, or whomever - your nuclear weapons are the great equalizer and keep you safe. Other countries have a lot more people than you and will catch up or surpass you technologically and can invade you. Nuclear weapons immediately stop that. Let's say China (and I'm not a fan of the idiotic relations between the US and China and the foolishness on both sides) decides that Japan just has to go. What stops them? You could say the United States, sure, but what really stops them? It's not the US Army, or the Marines - the air force and navy certainly play a part in "hey we'll come try and blow your stuff up" but what really stops them is that, no matter how much manpower they have, no matter how many airplanes or tanks they build, or how many rockets or missiles they can construct, a nuclear weapons makes all of that pretty much useless. It allows countries with smaller populations to posses weapons such that big countries can't go stomping around and hurting them. Is North Korea really scared of the United States military coming from all the way across the ocean to help South Korea? Or are they scared that the United States will drop nuclear bombs on the country? People forget how easily countries can slip into war, even between great powers. If you live in the UK or something - you better hang on to your nuclear weapons for dear life. It sounds fun and all good to have everybody disarm, until some big country decides to come after you and you're hoping other people want to help you out.