Rockefeller was a business mogul of the nineteenth century. He was the co-founder of the Standard Oil Company, which was regarded as the first and most successful enterprise that dominated the U.S. oil industry at the time. John P. Morgan was a renowned business magnate. He was an American banker, art collector, and financier, who controlled the American corporate world. Brands opted to focus primarily on Andrew Carnegie, John D. Rockefeller, and John P. Morgan because of their immeasurable financial affluence and their vital roles and dominance in paramount industries in the United States, at the time (Brands, 99). Morgan, Carnegie, and Rockefeller were good choices, on Brands part. However, in the course of time, many authors have studied them. Therefore, they offer minimal insights with regard to the significant rise in the American economy. In this regard, Brands could have incorporated other people or groups in order to offer different and fresh insights. For instance, Brands could have incorporated the likes of Robert Baron and John Cleveland Osgood, preeminent business and industrial moguls of the nineteenth