The Enlightenment is often told as a story of reason defeating superstition — the light of rationality burning away the fog of faith and tradition. This telling flatters the present and misrepresents the past. The Enlightenment’s actual argument was narrower and more interesting: not that reason should replace all other modes of knowing, but that authority must be answerable to reasons.

The difference matters. A king who says “because I say so” is making a different kind of claim than a king who says “because it serves the common welfare.” The second claim can be challenged on its own terms. The Enlightenment did not abolish authority; it changed the currency in which authority had to pay.

This unfinished argument runs through every contemporary debate about expertise, tradition, and institutional trust. When people reject scientific consensus, they are not, at their most coherent, rejecting reason. They are questioning the authority of the institutions that speak in reason’s name — and they are applying, however clumsily, an Enlightenment tool to an Enlightenment institution. The demand that authority be answerable does not stop at the academy’s door.

What the Enlightenment left unresolved is how to weigh reasons against each other when reasonable people disagree. The nineteenth and twentieth centuries tried various answers — democratic majorities, economic efficiency, historical necessity — and found each one lacking on its own. The argument continues. It was never finished. Perhaps that is the point: an argument that could be finished would not be about anything worth arguing about.