Forget I Am Legend and Mad Max and all that. When the end times truly come, we as a species are well and truly screwed. Civilization is going to collapse in a second. The internet and technology has pretty much made us all unable to do anything practical, whether it's building a log cabin or hunting for food. These days, Ikea does both for us.
If you need further proof, just take a look at this photo. Toilets should be the simplest thing in the world to construct, but this meatbag has still managed to fluff it up. At no point during the installation of the seat, did they stop and think about all the other times they'd sat down on the can? Clearly not. They'll be the first ones eaten by zombies, mark our words.