Jevons Is Not a Paradox. It Is a Capacity Plan.
William Stanley Jevons (1865): efficiency that cheapens a substrate expands the opportunity set until total consumption rises. Hank Green’s fungibility ladder — specific goods, broad outputs, substrates — maps cleanly onto AI coding, electricity, and a possible fourth substrate: intelligence. This Virgil dispatch extracts the mechanism, the bind constraints, and what it means for agent fleets, infra capacity, and sovereign stack planning.