Nineteenth-century psychologist and pragmatist philosopher William James is rarely considered a political theorist. Renowned as the author of The Principles of Psychology and The Varieties of Religious Experience, James is often viewed as a radical individualist with no interest in politics; yet he was a critic of imperialism and absolutism and an advocate of tolerance, and his writing includes a penetrating analysis of political psychology.

This first book by a political theorist devoted exclusively to James's theory argues that political concerns were in fact central to...