We are "doomed" as it were. Can you prevent the kind of shit talked about on
This Site? If so, awesome, we are not "doomed"! But chances are you cannot and there is a lot of shit in this universe that could wipe us out completely. Pleasant thoughts I know. Just because something is unlikely to occur doesn't mean it will not occur. Life on this planet has been threatened for as long as its been around. Unlike other times in history, a species has the ability to destroy itself. I do not think nukes will never be used, I can think of many situations that would cause nukes to be shot off (
Like this one right here!
). Hopefully it will never happen. Though it is not as impossible as some make it sound.