By Lisa Lednicer, The Washington Post The audacious plan was hatched in secret. In the 1920s, John D. Rockefeller Jr. – son of the Standard Oil founder, ardent conservationist and one of America’s richest men – agreed to surreptitiously acquire thousands of acres of breathtaking scenery around Jackson Hole, Wyoming, and donate them to the federal government for a national park. At the behest of Horace Albright, the future director of the National Park Service, Rockefeller formed a company called the Snake River Land Co.