For a long time, it seemed that Aristotelians and Kantians had little to say to each other. When Kant the moralist was known in the English-speaking world primarily from his Groundwork and his Critique of Practical Reason, Kant's conceptual vocabulary of “duty,” “law,” “maxim,” and “morality” appeared quite foreign to Aristotle's “virtue,” “end,” “good,” and “character.” Yet ever since philosopher Mary Gregor's Laws of Freedom, published in 1963, made Kant's The Metaphysics of Morals central to the interpretation of his ethical thought, it has become clear that such “Aristotelian” terms as virtue, end, good, happiness, and character are also central to Kant. Aristotelians and Kantians now see that they have plenty to say to each other, and they have gone from being adversaries to sharing a sometimes unprincipled urge to merge central aspects of Aristotle's and Kant's ethical thought.