https://www.sciencedaily.com/releases/2018/06/180613101950.htm > To put that number in perspective, the U.S. and Russia each currently have thousands of nuclear weapons. Both nations hew to the concept of nuclear deterrence -- more firepower is intimidating and makes other countries think twice before picking a fight. > More than 100 nuclear weapons in a nation's arsenal does more harm than good -- as using them can destabilize the country that uses them even in a best-case scenario.