John W. Davis reminds us of the immense importance of getting the law right so that others can make their contributions to society. But, just as good doctors or teachers are careful to tailor their work to each particular patient or pupil, we need to tailor copyright law to the needs of societies. If we continue to assume that copyright should function uniformly, then copyright law will continue to do harm to all those who are not the equivalent of the standard patient or pupil. In truth, the perversity of the current global copyright regime is mind-boggling. Imagine the principal law governing health care reducing overall health – even for the rich. Imagine the principal law regulating education actually making kids less intelligent on average. However, if we acknowledge that copyright can play numerous roles and that its effects depend on social variations, then we can turn it into a force for good.