To prevent dictators getting ahold of nuclear weapons. You want more north koreas? Just letting dictators run loose is how you get more koreas and russias and middle easts. If the US was like the British empire, it’d own all of Europe hand in hand with the Soviet Union AND Britain. Now once again, the US has to step in and play god because germany AND France AND the rest of the EU is repeating itself and letting the rest of the world down by not confronting dictators.