The Life Cycle of Money
I wanted to understand how money actually works. Not the metaphors about printing presses or vague explanations about central banks, but the actual accounting entries, balance sheets, and institutional mechanics. Every explanation I found either treated money as a physical commodity or skipped over the details with hand-waving. So I traced the full lifecycle myself: where does legal authority to issue currency come from, how do central bank balance sheets expand, what happens when a commercial bank makes a loan, how do payment systems actually move money, and why do trade deficits result in foreigners holding Treasury securities. This is what I found.
Approved Is Not Paid
Starting from the simplest possible model, two parties and one ledger, this post derives the full architecture of cross-bank payments through a series of questions. It maps the 7-layer execution pipeline, identifies the cross-cutting concerns that prevent it from breaking, shows who controls each layer and why the settlement layer is intentionally closed to private actors, and traces a single card payment end to end. The central insight is that authorisation and settlement are different events, that regulation is load-bearing rather than incidental, and that the system runs on delayed consistency held together by institutional trust.