The divergence comes late, when London thinks it has survived. On the night the Great Fire of London should have weakened, the wind does not ease. It holds, and the fire keeps its teeth.
That single change turns a devastating city fire into a national emergency. The flames are no longer confined to the medieval core. They press farther west toward Westminster, and the south bank stops being “safe by water” and becomes another front.
The central tension is not just destruction. It is governance. A capital is paper, procedures, credit, and people. When those are scattered into fields and market towns, the state either adapts fast or it starts to drift.
Real history sets hard limits. There is no modern fire service, no rapid communications, no insurance system ready to absorb shock at scale. There are orders, militias, barrels, hooks, and gunpowder. And there is fear, sharpened by war and rumor.
The story turns on whether authority and credit can be rebuilt faster than hunger and panic can set the terms.