The Collected Letters of Henry Northrup Castle

George Herbert Mead, one of America’s most important and influential philosophers, a founder of pragmatism, social psychology, and symbolic interactionism, was also a keen observer of American culture and early modernism. In the period from the 1870s to 1895, Henry Northrup Castle maintained a correspondence with family members and with Mead—his best friend at Oberlin College and brother-in-law—that reveals many of the intellectual, economic, and cultural forces that shaped American thought in t