Nuclear Weapons

In the long run, it is beneficial for a country to have weapons. It is mostly used for protection. Otherwise, it is like waiting to die, if all the other countries have them. It is like the average household having a gun in case of an intruder. Most likely, the intruder will have a weapon, so it is natural to take necessary precautions. You don't want anyone to know that you're unarmed. If they do, they will take their chances. You also, don't want them to think that you're too well armed. They will consider you a threat and try to gang up on you. They may get help from other countries to take down another country.