Does this belong in the world events section? I don't know.
Anyways, how do you think mankind will die out? Apocalypse? Zombies? Aliens? Food Shortage? Global Warming? Water shortage? Overpopulation? Lack of air? Or do you think mankind will survive through all these?
And approximately what year do you think this will happen?
I think that some of the scenarios that Firetail mentioned are to outlandish and unlikely. We should be looking more towards massive hurricanes, huge scale earthquakes, a pandemic or incurable disease, global warming, nuclear war, and many, many more.
I think probably nuclear war. The strongest countries have nuclear capabilities, and one day, when they're in a war, they'll just go too far and the whole planet will be unsuitable to live on.But this is too depressing....
You really think it won't happen in our lifetime? By scientific research they say the world can only support about 20 billion life at most, and it will pass that in 2025 in the way we're going right now.