California, Wallace Stegner observed, is like the rest of the United States, only more so. Indeed, the Golden State has always seemed to be a place where the hopes and fears of the American dream have been played out in a bigger and bolder way. And no one has done more to capture this epic story than Kevin Starr, in his acclaimed series of gripping social and cultural histories. Now Starr carries his account into the 1930s, when the political extremes...