Part VIII: Orchestration & The Second Gilded Age
This is your thought leadership moat.
Audience: Architects → Principals
Every rail in this book eventually feeds the same question: who sits on top? This Part is about the layer above individual payment methods. Chapter 31 explains why multi-PSP reality made orchestration inevitable; Chapter 32 goes inside the routing engine — retries, fallbacks, and the network rules that constrain them. Chapter 33 follows the same logic into the frontier: AI agents spending money, the protocol wars around them, and why the rail is never where the value sits. Chapter 34 closes the Part by zooming out to the geopolitics — fragmentation at the surface, consolidation in the plumbing, and the power map every architect now has to navigate.