Unfortunately on closer examination one sees that McGerr has produced a superficial book. It's not just that looking at the endnotes one finds that most of the book could have been written a decade earlier with little loss, with some chapters printed two or three decades earlier. It's not just that the chapters on labor and business are not especially original. There are larger problems with causation and logic. One of the things researchers in the seventies and eighties noted about Progressivism was its variety. It had supporters in all regions, it appealed to workers and farmers as well as the middle class, it appealed to immigrant Catholics, Protestant moralists, and secular intellectuals. Progressives could be in both parties, and included racist imperialists and the most humane socialists. Instead of dealing with this variety, McGerr limits it to the middle class, since none of the other groups "advocated the full range of progressive positions as consistently as the middle class did." The problem is that the same middle class made up the overwhelming majority of politicians in the unProgressive Gilded Age, as well as the overwhelming majority of politicians in the age of Harding and Hoover. In the fifties Richard Hofstadter introduced the idea of "status anxiety." This idea was a flawed one, but at least it tried to explain why some of the middle class supported Progressivism and others didn't. McGerr never does so.
There are other gaps. There is no discussion of Progressivism in a comparative context, so we do not learn how successful they were in comparison with their European contexts (This is especially true of their view of the state). Much discussion of Progressivism asks about its connection with modernity. Was the Progressive endorsement of such things as prohibition and racial segregation a sign of its reactionary character? Or did such measures show how "modern" apparently reactionary people as prohibitionists and racists were? And if so, what does that say about modernity as a whole? McGerr does nothing to answer this question. There is no discussion of foreign policy before the First World War, no real discussion of why the United States entered the war, and little discussion of its postwar plans. This complicates the whole idea of a Progressive break with its predecessors and successors. There are obvious continuities with McKinley and Roosevelt, and scholars such as William A. Williams and Frank Costigliola have pointed out that the twenties was not an era of simple minded isolationism.
There are problems with McGerr's emphasis on pleasure as the solvent of Progressivism. There is an emphasis on increasing sexuality, but there are no facts about illegitimacy, pre-marital sex, prostitution or abortion. Moreover, far from dying in 1920, the twenties marked the triumph of Prohibition, and it was still an electoral winner for Herbert Hoover in 1928. Not did Protestant Hegemony go away either. At other points McGerr takes his sources' complaints at face value, whether about Progressive distaste for the vulgarly wealthy or Republican complaints about the First World War. It is not clear why regulation of the economy should be so fatal to the Democrats, when conservatives accepted a version of it in Britain and France and won the post-war elections. And to say that Progressives shouldn't have tried too hard simply reflects journalistic cant and its willingness to split the differences between the two sides, as well as its easy contempt for people with more principle. One could ask industrial workers denied a union, immigrants and African-Americans living with the GOP's enormous condescension, or Sacco and Vanzetti whether Republican domination was simply part of the natural balance of things. Ultimately this is a book that is less than it appears. In such works scholars tend to summon up amusing anecdotes as a substitute for analysis. But McGerr is no Orlando Figes or Simon Schama. The most memorable story concerns the fact that J.P. Morgan, when he didn't like the tune of the hymn being played, would ostentatiously jingle the coins in his pocket. Those crazy rich people.