“We thought we knew the story of the twentieth century,” Charles Maier notes in an announcement for his new book The Project State and Its Rivals. Both haunting and tantalizing, the sentence’s past tense speaks to a profoundly contemporary mood. As the twenty-first century progresses, confident visions about the previous century conceived from the vantage point of the 1990s—the “age of extremes” resolved by a set of liberal settlements—no longer…