@JoshuaSlocum @jb @monsterislandcolonizer The problem with "What happens when we lose the cities" is a translation problem; it's kind of like asking 'what would happen if you didn't eat breakfast' to someone who already didn't eat breakfast.

For an individual there is nothing they can reasonable do if "we lose the cities" - all you can do is try to get hard copies of critical works. And many preppers, especially those in the past, did exactly this.

There are also people that work on "how would you make electronics without access to pure chemicals" and questions like these.