Throughout his life, Kant was concerned with questions about empirical psychology. He aimed to develop an empirical account of human beings, and his lectures and writings on the topic are recognizable today as properly 'psychological' treatments of human thought and behavior. In this book Patrick R. Frierson uses close analysis of relevant texts, including unpublished lectures and notes, to study Kant's account. He shows in detail how Kant explains human action, choice, and thought in empirical terms, and how a better understanding of Kant's psychology can shed light on major concepts in his philosophy, including the moral law, moral responsibility, weakness of will, and cognitive error. Frierson also applies Kant's accounts of mental illness to contemporary philosophical issues. His book will interest students and scholars of Kant, the history of psychology, philosophy of psychology, and philosophy of action.

This book offers a comprehensive account of Kant's theory of freedom and his moral anthropology. The point of departure is the apparent conflict between three claims to which Kant is committed: that human beings are transcendentally free, that moral anthropology studies the empirical influences on human beings, and that more anthropology is morally relevant. Frierson shows why this conflict is only apparent. He draws on Kant's transcendental idealism and his theory of the will and describes how empirical influences can affect the empirical expression of one's will in a way that is morally significant but still consistent with Kant's concept of freedom. As a work which integrates Kant's anthropology with his philosophy as a whole, this book will be an unusually important source of study for all Kant scholars and advanced students of Kant.

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In his Groundwork of the Metaphysics of Morals (1784), Kant explains that ethics, like physics, ‘will have its empirical part, but it will also have a rational part, … though here [in ethics] the empirical part might be given the special name practical anthropology’ (4: 388). In the Groundwork, Kant suggests that anthropology, or the ‘power of judgment sharpened by experience’, has two roles, ‘to distinguish in what cases [moral laws] are applicable’ and ‘to gain for [moral laws] access to the human will’ (4: 389). Twelve years later, the first function, of applying the categorical imperative to specifically human situations, is incorporated into Kant's Metaphysics of Morals (1797).

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