Professor H.G. Callaway has published widely in both the US and Europe on the philosophy of language and meaning and on the interpretation of American intellectual history. He holds a doctorate in philosophy, has lectured widely in both the US and Europe, and has taught at American and European universities and at the University of Ibadan, Nigeria. His work in American philosophy and intellectual history includes many professional articles and reviews, critical editions of works by Ralph Waldo Emerson and William James, and a critical study of A.J. Dallas and the philosophy of law in the foreign relations of the early American republic. His most recent monograph, Pluralism, Pragmatism and American Democracy, was published in 2017.