Weren't the World Wars worse?
That's all that needs saying on the subject really, it renders the idea that we are spiralling towards some sort of apocalypse simply absurd.
But what if a third world war happens this century and nukes are used?
Thats the war there. Nukes will be used to take out other nukes. Thats about 1/3 of the population of any country with nukes. Then comes the nuclear winter, which will take out 2/3rds of the human population, due to zero planning. Military and governement will clapse, as they have a place to hid and survive. In the end, there is a serious case that there won't be any troop fighting.
After 60years the planet starts again, winters are less cold, oceans start to warm to the right temperature, nature takes over. Human come out in groups, as that is the only way we could survive. Towns sprout, population increases, The world population is now in the millions(mid). Medicine and technology, computers, radios, working on primitve land line connections come back. Life starts again.