If you are intent on actually planning for the collapse of civilization, the best chance for survival is to do everything in your power to prevent the collapse. Because if civilization collapses, the people who need to read about what to do in the library are already fucked.

Unfortunately, civilization is moving towards self-destruction, it will collapse, it's only a matter of time, and it seems that this will happen very soon, I don't know what the minimum period is, maybe in a year or several, maybe in five or ten years, if billionaires are sent to the guillotine.

If you’re writing a novel, the place to do your research is a library. You might need to go to a large library in a big city to have access to everything you need.

To be honest, I just burned out from it, but yes, it's my hobby, but I'm not interested in the genres of the post-apocalypse or the end of the world.