I'm curious why it was invented. Guns, tanks, and aircrafts I understand the use of it to maintain order and security but who started the idea of creating nuclear weapons. A weapon powerful enough to destroy a country in an instant and kill many lives.
Nuclear weapons shouldn't have exist in the first place as the countries that have it makes them feel they're superior and use it to gain control over other countries.
It has many advantages and disadvantages and the main reason for this is that in the past, war was fought with hands, but that too was fought on the basis of numbers. But in the present era, war is fought on the basis of the number of weapons and the present era is better than that era because in those wars there was bound to be losses, but in the present era there are fewer. That is because fighting a nuclear country is not an easy task, so some agreements are made and the war is stopped. This is absolutely true, but it also means that we can sleep peacefully, that is a different matter that the other country has no idea what it will do when, but we have such tools with which we can win the war.
Obviously, they understand that by acquiring this, we can destroy many countries at the same time, just like Pakistan has an atomic bomb that can destroy the whole of India, and similarly, America has such fighter jets that it can destroy many times. It is not used mostly for control, but rather for peace in one's country and living one's life, and it is used only when someone attacks or harasses one's country.