My dad was a USN Seabee, who’s unit moved into Nagasaki, after the blast. He thought that most people,would find the post blast world extremely traumatizing and physically demanding. His comment re 1960s Hydrogen bomb which has since been eclipsed a thousandfold at least. The article didn’t address dealing with a Neutron bomb, which is designed to leave infrastructure intact, but intended instead to penetrate such deeply, to create cell damage to living organisms.
It isn't hysteria, and GMO isn't 'evolution'. One of the biggest issues for preppers and survival is that GMO seeds will not reproduce in the same way if the seeds are saved and re-used. In fact, in many instances (maybe all?), it's illegal to save the seeds and re-use them! It's far better to track down heirloom seeds that are native to your area and/or compatible with your climate. A good place to start looking is ×