III. The History of Urantia
Part III, purporting to be an account of the history of this planet, used the broadest array of sources, ranging from historical-geology textbooks to books on the history and philosophy of religion. The multi-volume The Corridors of Time, by Harold Peake and Herbert John Fleure, and two books by Henry Fairfield Osborn (Men of the Old Stone Age and Man Rises to Parnassus) were the main sources for the sections dealing with prehistoric and ancient peoples. Sumner & Keller’s four-volume The Science of Society (1927) was the predominant source for the papers dealing with the evolution of government, marriage and religion. Sources were used much more sparingly in Papers 105-110, 113-117 and 119; these papers have far more in common, thematically, with papers in Parts I and II than with the earlier ones in Part III.