The vulnerability of our electric and petroleum systems.
You are correct. If anything happens to our electric grid and our petroleum energy supply, everything thing else will come to a standstill. Everything runs on energy and those are our energy sources. Without them we have no food, no clean water, no medicines or anything which has to go from one place to another. Millions will die and the rest will wish they were dead. How I long for the days before we were so dependent on computers.