John R. Van Atta, who received his Ph.D. in history from the University of Virginia, specializes in the Early Republic period of U.S. History (1776-1865) as well as nineteenth-century America generally. He taught at Hiram College in Ohio and, for thirty-six years, at Brunswick School in Greenwich, Connecticut, where he held the Oaklawn Chair in American History until retiring in 2020. He is the author of four books, Securing the West: Politics, Public Lands, and the Fate of the Old Republic, 1785-1850 (2014); Wolf by the Ears: The Missouri Crisis, 1819-1821 (2015); and Charging Up San Juan Hill: Theodore Roosevelt and the Making of Imperial America (2018), all published by the Johns Hopkins University Press.