Rules are everywhere. They tell us which side of the road to drive on, how many players may stand on a football field, when we should wait our turn, what clothes are appropriate for certain occasions, and even which fork we are expected to use at a formal dinner. Some rules are written into law …
A closed door presents one of the smallest moral decisions of everyday life. We may know the person on the other side. We may even have every practical reason to enter. Yet most of us instinctively raise a hand and knock, then wait. The entire ritual takes only a few seconds, but those seconds acknowledge …