Public reasoning is widely thought to be essential to democracy, but there is much disagreement about whether such deliberation should be constrained by a principle of public reason, which may seem to conflict with important democratic values. This paper denies that there is such a conflict, and argues that the distinctive contribution of public reason is to constitute a relationship of civic friendship in a diverse society. Acceptance of public reason would not work against mutual understanding, learning, or compromise, nor (...) does the principle involve any violation of political equality. The real threat to democracy is not public reason, but the framing of public reason by a presumption against state action. (shrink)