Author of American Philosophy before Pragmatism, (Oxford, 2015), American Philosophy and the Romantic Tradition, (Cambridge, 1990). Pragmatism: A Contemporary Reader, (Routledge, 1995) Wittgenstein and William James (Cambridge, 2002), Contending with Stanley Cavell, (Oxford, 2005), Pragmatism: Critical Concepts in Philosophy, 4 vols. (Routledge, 2005).  Publications in The Oxford Handbook of American Philosophy, The Cambridge History of Moral Philosophy, History of Philosophy Quarterly, Philosophy East and West, Journal of the History of Philosophy, Emerson Society Quarterly, Metaphilosophy. Journal of the History of Ideas. Contributor to the Routledge Encyclopedia of Philosophy and the Stanford Encyclopedia of Philosophy (Ralph Waldo Emerson, Transcendentalism and William James) and to volumes on Emerson, Wittgenstein, and pragmatism.

Project Director for NEH summer institute on Emerson in 2003 and for NEH summer seminars on Emerson and Pragmatism in 2005 and 2007 respectively.