Do we have enough nuclear weapons to wipe out all of humanity? I have heard several claims that we have enough nuclear weapons to wipe out all of humanity, but has anyone actually done an exact calculation of whether we do? The claim includes: * All of the nuclear weapons which are currently built by the whole of humanity (according to available statistics). * All the direct deaths due to exploding them in the most damaging way (caused by the blast, fallout, radiation poisoning, nuclear winter and whatever other direct consequences that can be accurately predicted)

Check out this app which lets you figure out what happens if a bomb went off in your city. There is also one here at the federation of american scientists.

This site talks about the nuclear clouds and how much sunlight would be blocked.

The radiation is what you really need to worry about.