I have great respect of the people of India. When nuclear weaponry was initially developed, some of the people involved felt they were serving the greater good. Once the evidence of destruction the bomb created in Hiroshima and Nakasaki made its way back to this country, even Oppenheimer was stunned at the capacity for devastation. No human had conceived at just how massive it would be. Mankind has since struggled with undoing the creation of nuclear power - no one wins in a nuclear war.
Men create weapons of mass destruction because of hubris, arrogance, and sadly, evil.
It serves no other purpose than to destroy life as we know it. Having it and getting rid of it isn't as easy as you would suggest, Nimesh. It isn't as if all the world's leaders could come into a room and lay out their weapons on a table. There is always someone who is going to hold out and that is why no one country has completely given up their warheads. And it is ludicrous to think about it.