Did someone say apocalypse ?

In 2112 there will be someone still predicting the end of the world. Some crazy guy who predicted something vague and gained infinite credibility. The reality of the matter is in 2112 we will have changed just as we have in the last century. Of course the technology will be better because they are always making strides and every so often there is a major break through like the microwave for example. Or the car. It is crazy to think what break through we might make in the next century. Anti-gravity devices I hope. There will not be an event that scorches the earth or a massive flood. I believe that if this world is to lose its population of humans it would require biological warfare. Something that kills the environment while killing humans at the same time. But if the human race ever becomes extinct it will be by our own sword. Nations who have been bickering for decades snap and elevate their problems to a world wide scale as opposed to a regional scale. In a hundred years I'm not worried about some apocalypse. I'm worried about Nations at War provoking a nuclear world war.