Across the modern West, a familiar anxiety has taken hold — the conviction that newcomers endanger civilisation. The rhetoric is dramatic and relentless: talk of invasion, replacement, collapse, cultural loss. It’s a story repeated so often it begins to feel like fact.
But the historical record tells a very different story. Every major civilisation — from the ancient Mediterranean to medieval Europe to the modern West grew because people arrived from somewhere else. Movement has always been a source of renewal, not decline. And the societies most fearful of newcomers are often the ones most dependent on them.
This video traces that history: where the idea of the “immigrant threat” comes from, why the panic keeps returning, and what it reveals about the societies that believe it. From Greece and Rome to Britain and Japan, the evidence is remarkably consistent. Civilisations flourish when newcomers arrive and falter when they turn inward.
