How Rockefeller Spent $650M on Hitler.In 1929, John D. Rockefeller's Standard Oil signed a $35 million patent deal with IG Farben, Germany's most powerful chemical cartel. At the time, it was just business. A decade later, that same technology was powering Hitler's tanks. This is the story of how a routine corporate agreement became one of the most controversial business decisions in American history and how Standard Oil ended up at the center of a wartime treason