A conversation with Ed Watts (University of California, San Diego) about his recent book, The Romans: A 2,000 Year History (Basic Books 2025), which covers two millennia of Roman history, down to 1204 AD. We talk about questions of scale in writing history, of continuity and discontinuity in the Roman experience, and what enabled this polity to last for so long. What insights does studying its second millennium (at Constantinople) cast on its first (at Rome), and vice versa?