Charles Austin Beard (November 27, 1874 – September 1, 1948) was, with Frederick Jackson Turner, one of the most influential American historians of the first half of the 20th century. He published hundreds of monographs, textbooks and interpretive studies in both history and political science. His works included a radical re-evaluation of the founding fathers of the United States, who he believed were motivated more by economics than by philosophical principles. Beard's most influential book, written with his wife Mary Beard, was the wide-ranging and bestselling The Rise of American Civilization (1927), which had a major influence on American historians.