Agreed, it's about the magnitude of the impact. A massive economic crash would affect people in the countryside too but the difference is that there is a much h

Agreed, it's about the magnitude of the impact. A massive economic crash would affect people in the countryside too but the difference is that there is a much higher chance to survive by downgrading your lifestyle. As a basic example, you can't go fishing in the city to catch your own food, especially if there are millions of people competing to fish in the same river. There are also no wild fruit trees or farms there. Only way to survive would be cannibalism - That's what happened to Leningrad/St Petersburg during WW2 as a result of a military siege.