I give us well more than until 2500. I\'d say its thousands upon thousands of years before we even get close to becoming extinct as a species.
You say that our technology advancing is a bad thing, but I see it as a good thing. We realize already the deadly weaponry that has been created, and are moving to correct that. Research on bigger and more powerful bombs has decreased dramatically, and we are working on spending billions on missile defense systems.
Overall though, I don\'t think there are enough people who want to see the human race end for it to ever happen. There are people willing to give their own life for a cause, but I don\'t know that there are too many who would want to give everyones life for one. That would just be pointless and stupid. We have survived thousands upon thousands of years already, and I think we have come to the point where we will be able to survive thousands upon thousands more, even under the worst of circumstances. If people began to nuke places, there would be areas designed to house people safely in such conditions.
And besides, how many nukes you think it would take to kill everyone in the world? There are enough to kill a ton of people now, but with how people could take shelter from the radiation, I don\'t think we have enough to kill everyone in the world.
And I also think that it may be less likely than ever that we will be whiped out. The way we control the world, we would never let another species evolve to become the dominant one. Our progress in areas like space travel will only lead to a greater and greater chance of our survival.
As for aliens, why do we assume that they will want to kill us all? They would almost certainly be friendly. Otherwise, it is hard to advance as far as they would need to in order to get here. Besides, it may not even be possible to travel that far.
And as for the apocalypse or any other religious theory...I don\'t buy any of that stuff.
I give us many thousands of years at the very least. I clicked other, because I didn\'t think after 2500 accurately represented that belief. Maybe if it were after 25000, I would have clicked it.
Besides, Time is all relative anyway. If we ever are able to travel up to the speed of light, there could really be no limit.