Aids? Cancer? we have beat those. Flooding won't kill everyone. Man has lived without electricity before, and man has lived with total chaos before. Anything but total annihilation of the earth, wouldn't kill us off.
surely, you jest that we have Cancer beaten. And there are always new forms of viruses and bacteria forming each day, and those that have become resistant to medications.
I don't think that we will totally be wiped out, but there is always a chance that we can be severely decimated.
Has man lived without electricity, with this amount of population? With this amount of drug addiction, greed, lack of leadership thru-out the world, and division? It's not just the electricity, it's a combination of things...there is no one thing that will get us.