In his Metaphysics of Morals, Kant famously wrote “The distinction between virtue and vice can never be sought in the degree to which one follows certain maxims…In other words, the well-known principle (Aristotle’s) that locates virtue in the mean between two vices is false.” Kant is not the first (or the last) thinker to take to task Aristotle’s doctrine of the mean, but he is representative of a line of criticism of Aristotle’s doctrine which argues that ethics is the realm of determinate necessary principles and Aristotle’s doctrine of the mean only supplies an indeterminate difference between virtue and vice. In response to such critics (among others), Gottlieb’s Virtue of Aristotle’s Ethics provides a defense of Aristotle’s ethical p...