...nuclear warfare is not necessary to cause a breakdown of our society. You take a large city like Los Angeles, New York, Chicago-their water supply comes from hundreds of miles away and any interruption of that, or food, or power for any period of time, you're going to have riots in the streets. Our society is so fragile, so dependent on the interworking of things to provide us with goods and services, that you don't need nuclear warfare to fragment us anymore than the Romans needed it to cause their eventual downfall.