Intelligent people defend failing ideas for the same reason geocentrism endured for centuries: beliefs don’t live in isolation. They’re embedded in worldviews—stories about how the world works and where we belong in it. When new evidence threatens that story, the mind often responds by protecting the narrative rather than updating it.

This isn’t one mistake, but a stack. Social reinforcement encourages agreement with authority and consensus. Heuristics make familiar explanations feel safer than unfamiliar ones. Belief perseverance allows contradictions to be absorbed rather than confronted. Over time, these forces normalize inconsistency. Each adjustment feels small, reasonable—even necessary.

The story of Nicolaus Copernicus shows that this pattern is ancient, human, and non-partisan. Evidence alone rarely changes minds. What changes minds is a shift in perspective—a willingness to step outside the worldview itself. Critical thinking begins not with facts, but with the courage to ask whether we’re defending truth…or simply the story we’re most comfortable living inside.