From Radical Empiricism to Kant's Critical Idealism

“Hartnack has a remarkable ability to write clear, concise synopses of difficult and important philosophical texts and issues, in part because his research interests range across the whole history of philosophy and he is unconstrained by what have too often been methodological cum ideological divisions in the field. Because of his wide-ranging research interest, Hartnack is able to identify the genuine issues and the philosophical sense in Hegel’s text where others often get stuck in terminological confusion. Consequently, Hartnack’s philosophical acumen keeps his synopsis focused on Hegel’s text and issues. . . “ – Clio: A Journal of Literature, History and the Philosophy of History

"... Hartnack's willingness to engage in an openly philosophic approach to philosophic history is admirable. . . " - International Studies in Philosophy