From 1936 to 1945, Ivens was based in the United States. For Pare Lorentz's U.S. Film Service, in the year 1940, he made a documentary film on rural electrification called "Power and the Land". It focused on a family, the Parkinsons, who ran a business providing milk for their community. The film showed the problem in the lack of electricity and the way the problem was fixed. Ivens was, however, known for his anti-fascist and other propaganda films, including "The Spanish Earth", for the Spanish Republicans, co-written with Ernest Hemingway and music by Marc Blitzstein and Virgil Thomson. Jean Renoir did the French narration for the film and Hemingway did the English version only after Orson Welles' sounded too theatrical.. This film was financed by Archibald MacLeish, Fredric March, Florence Eldridge, Lillian Hellman, Luise Rainer, Dudley Nichols, Franchot Tone and other Hollywood movie stars, moguls, and writers who composed a group known as the Contemporary Historians. " Spanish Earth " was shown at the White House on July 8, 1937 after Ivens, Hemingway, Martha Gellhorn, had had dinner with President Franklin D. Roosevelt, Eleanor Roosevelt and Harry Hopkins. The Roosevelts loved the film but said that it needed more propaganda. This 1937 documentary was considered his masterpiece.