This ancient legal principle once governed empires—and it might now protect our eroding coasts.

As rising seas swallow coastlines and private development fences off public access, America’s beaches are in crisis. But a 2,000-year-old Roman law might offer a surprising solution. Known as the Public Trust Doctrine, this ancient legal principle held that shorelines, rivers, and the sea were common property—owned by no one and shared by all. In Roman times, it protected the public’s right to access and use natural resources. Today, that same doctrine could be the key to reclaiming eroding beaches, restoring public access, and challenging private interests that treat the coast as their own. It’s old—yet more urgent than ever.








