#798: The Roman Playbook for Destroying a Currency with Jeremy Ryan Slate

— Roman emperors systematically debased the denarius from 95% silver (1st century A.D.) to 2–4% pure silver by the 270s, losing 90% of its value in ~200 years to fund military pay increases and donatives.

— Septimius Severus doubled legionary pay and expanded the army after the year of five emperors (193 A.D.), establishing a spending blueprint all subsequent emperors followed, directly causing currency collapse.

— Military dissatisfaction with debased currency manifested as mutinies, the creation of 26 rival emperors in 50 years (235–284 A.D.), and the rise of barbarian federati (non-Roman soldiers fighting under Rome's flag).

— Diocletian attempted price controls (~301 A.D.) to combat inflation; this failed and drove commerce into black markets as people reverted to bartering goods rather than accepting worthless coins.

— Constantine fixed the monetary crisis by introducing the gold solidus (~314 A.D.), which maintained stable value for ~700 years, while also unifying belief through Christianity and disbanding the Praetorian Guard.

— The Eastern Roman (Byzantine) Empire survived 700+ years of monetary stability under the gold standard, whereas the Western Empire fell in 476 A.D. partly because sound money and shared belief broke down.

— Monetary policy determines state stability more than military might or ideology alone. When currency loses public trust, armies mutiny, political legitimacy collapses, and black markets replace formal commerce—exactly as occurred in Rome's Third Century Crisis and parallels modern inflation erosion.

— The Cantillon effect ensures inequality widens under fiat money creation. Early recipients of newly printed currency (bankers, asset owners) benefit before prices rise; wage earners further down the economic ladder lag behind, just as Rome's military and poor felt debasement's sting first while elites held hard assets.

— Sound money (Constantine's gold standard) and shared belief (Christianity) create the conditions for long-term stability and resilience. The Byzantine East lasted 700+ years on a stable currency; the West collapsed in 476 when faith in both money and empire evaporated.