At the outset of this book, we argued that there is a problem with, perhaps even a crisis of, architectural judgment in the United States. In a period such as our own-one with radically changing social, economic, and environmental conditions-what criteria should practitioners use to judge their actions and works? Above, sociologist David Brain suggests that the professionals, presumably in any age, should exercise judgment that is disciplined by years of study and on-the-job training. He also holds that professional judgment refers to the history of “other such judgments . . . of a particular sort.” For the design disciplines, that history of judgment is, of course, the canon, as we defined it in Chapter 1-the collection of exemplary works used by experts in the field as the “basis for judgment” in determining the significance of any particular architectural work.