That's the thing about zombies. They don't adapt and they don't think. Literally, you could have a zombie on one side of a chain link fence and you could be on the other side and they could be trying to get to you and six feet down could be an open door and they will not go through that door in the fence. That's why they're so scary.
We live in such a service-based, globalised economy where very few people actually make anything and the people who do make stuff... it's all part of a massive global supply chain. So what if all those chains were suddenly cut, how would you make something? How would you keep people alive? And that was something I wanted to explore.