On September 11, 2001, we were a people united by our common beliefs. It is a tragedy that those few months of national, moral, and spiritual unity were too soon lost. Still, we remain bound, whether we show it or not, by certain principles that are elusive but powerful. In the great historical accomplishments of America, these apparent opposites of commitment and tolerance are bridged by civility. In its deepest sense, civility means respect, listening, and dialogue. Yet, in the American experience, civility has not always prevailed, and its role in our political culture cannot be taken for granted.