The Historians' History of the World, subtitled A Comprehensive Narrative of the Rise and Development as Recorded by over two thousand of the Great Writers of all Ages, is a 25-volume encyclopedia of world history originally published in English near the beginning of the 20th century. It was compiled by Henry Smith Williams, a medical doctor and author of many books on medicine, science, and history, as well as other authorities on history, and published in New York in 1902 by Encyclopædia Britannica and the Outlook Company. It was also published in London printed by Morrison & Gibb Limited, of Edinburgh. A second edition was published in 1907 in London by The Times. Two further volumes were subsequently released in the 5th edition of 1926, titled "These eventful years" and dealing with the First World War, published by Encyclopaedia Britannica.

Rupert Raleigh Hughes was an American novelist, film director, Oscar-nominated screenwriter, military officer, and music composer. He was the brother of Howard R. Hughes Sr. and uncle of billionaire Howard R. Hughes Jr. His three-volume scholarly biography of George Washington broke new ground in demythologizing Washington and was well received by historians. A staunch anti-Communist, in the 1940s he served as president of the American Writers Association, a group of anti-Communist writers.