There is only one way that humanity will finally end - and yes, it will be by nuclear war. And it's not very far off at all. There is no other way that the fate of humanity can go. There is such a lack of human compassion and empathy and such a desire to cause hurt, it's just a matter of hours. So don't think it won't happen. There's no other possible outcome for us at this point, none whatsoever (unless an asteroid demolishes us first, that is).