... elsewhere, while civilizations fell.See, I don't believe at all that as soon as shit hits the fan we all will turn into murderous cannibals. History is filled with examples of apocalyptic events, ranging from foreign invaders to volcanic eruptions and everything in between. Civilization always endured.
Even when Globalization falls, there will always be new pockets of greater or lesser civilization.
You do not need a zombie apocalypse: just look at sale rushes, greater blackout, bank runs... everyday life whenever money and/or responsibility is/are involved...

