In his new book Inside Money: Brown Brothers Harriman and the American Way of Power, the prolific Zachary Karabell uses the history of Brown Brothers Harriman to follow the arc of American political economy, from the muscular capitalism of the early generations of the Brown family in the 19th century, to their maturation as genteel private bankers in the 20th century, to the sense of service of the BBH partners when they were regularly called to Washington from the 1930s through the 1960s. It is a (mostly) positive tale about American history, American finance, American economic growth and innovation.  That makes it …