In the early 30s, nearly all of the world was run by relatively strong states, some authoritarian or even totalitarian. The exception was china were numerous warlords and factions constantly fought one another. How can this be reversed so that the vast majority of the planet collapses into warlord chaos while only a few areas are still actually run by actual governments. The only thing i can think of is some combination of a far greater Great Depression and a new global pandemic worse than the Influenza one at the end of WW1. Any thoughts on building a TL around this?