From the acclaimed, award-winning author of Alexander Hamilton: here is the essential, endlessly engrossing biography of John D. Rockefeller, Sr.—the Jekyll-and-Hyde of American capitalism.

In the course of his nearly 98 years, Rockefeller was known as both a rapacious robber baron, whose Standard Oil Company rode roughshod over an industry, and a philanthropist who donated money lavishly to universities and medical centers.

He was the terror of his competitors, the bogeyman of reformers, the delight of caricaturists—and an utter enigma.