Kant's Impure Ethics: From Rational Beings to Human Beings (review)

Kant's Impure Ethics sounds like the title of a very short book. Kant, strenuous advocate of purging everything empirical from moral theory in order to reveal the pure moral law a priori, is assumed by many to reject impure ethics. Louden sets out to correct that image of Kant. Not only does Kant offer some impure, by which Louden means empirical, ethics, Kant requires it in order for his moral system to work. Louden argues that impure ethics is an integral part of Kant's ethical project. Since as rational beings human beings are obligated to create a realm of ends, they need to be shown the specific manner in which they can create this moral realm in the specific world they inhabit. This impure ethics is never more than an application of the pure ethics and is not itself the source of any moral norms; Kant does not study human nature in order to establish or justify moral principles. Nor is impure ethics a sharpening of general duties to interpret them for our particular species or even groups within the species; Kant is not arguing that women or the French have duties peculiar to them. Rather impure ethics concerns the manner in which human beings can make morality efficacious in human life. Empirical knowledge of human beings can help determine the proper paths for humans to take in creating the realm of ends. Louden insists, as do some other recent commentators, that it is misleading to view the categorical imperative in isolation. Instead, Kant intended the categorical imperative to be understood in light of the development of a virtuous character. In its broadest sense the impure ethics concerns how all humans can develop that virtuous character.

Kant himself divides philosophical ethics into the pure metaphysics of morals and the empirical, or impure, anthropology (in the "Preface" to the Groundwork among other places), but readers would look in vain for a single work by Kant which would fit under the latter heading. The Anthropology from a Pragmatic Point of View, the most plausible candidate for such a text, contains much material only peripherally related to ethics and very little discussing specific moral applications. Given this lack of a published focus on the empirical side of Kant's ethics, Louden searches the Kantian corpus of books, essays, students' lecture notes, and the Reflexionen to collect relevant material. He finds five "fields of impurity": education, anthropology, art, religion, and history. Louden does an excellent service to Kant scholarship by drawing together these disparate sources and topics to highlight little-known areas of interest to Kant such as education reform and the role of an established church in promoting virtue. He defends Kant's theory against some charges of sexism and racism by noting that, although Kant was sexist and racist, he did always include all members of the species in his claims that moral progress would ultimately encompass everyone. The most worthwhile aspect of these particular discussions is the way Louden draws them together under a common theme pervading Kant's empirical ethics: the central role of progress. To work toward a realm of ends, human beings need to institute certain institutions in order to cultivate, civilize, and moralize themselves. These institutions will help to train individuals in the arts and sciences as a propaedeutic to ethical practices. The study of history shows that humans are destined to progress toward perfection, but actual progress depends upon concrete action. One is puzzled that here Louden includes Kant's discussion of a league of nations but not his direct political philosophy enjoining individuals to enter and support a state, the most important institution encountered in all of Kant's practical philosophy. Nonetheless Louden succeeds in revealing a unity in Kant's scattered hints on various topics.

In the end, Louden concludes...