The Collected Letters of Henry Northrup CastleGeorge Herbert Mead, one of Americas 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 Meadhis best friend at Oberlin College and brother in lawthat reveals many of the intellectual, economic, and