@Saptarshi With global warming, the virus, nuclear power, bioweapons.. -humans would be eradicated. Worrying and wild speculation is uncalled for, but it would be prudent to keep a close eye on the situation from as many news streams as we can handle.
I don't think WWIII would take place any time soon, because with the advent of such powerful weapons, world leaders would ponder over it for a thousand times before pressing the button.

@sup People Never know what's best in you only you know what's best, they just search what is best in you in theirs point of you not yours, only the closest person near you will know what's best in you and will know you in real!!!

For some countries, the carrying and use of weapons could be tightened (you know which ones)
There is no point in banning something that saves the lives of decent people every day (bad people will always find their way to guns and they will not be interested in not having papers for it)