CONSTITUTIONAL RIGHTS FOUNDATIONBill of Right in ActionSpring 2000 (16:2)Wealth and PowerBRIA 16:2 Home | King Leopold's "Heart of Darkness" | Rockefeller and the Standard Oil Monopoly | United States v. Microsoft Ro, Following the Civil War, few laws limited how businesses went about making money. In building the giant Standard Oil monopoly, John D. Rockefeller made up his own rules.