Provides the first full study of Aristotle's notion of evil and sheds light on its content, potential, and influence.

Introduction Pavlos Kontos; Part I. Kakon in Aristotle's Metaphysics and Biology: 1. Good and bad in Aristotle C. D. C. Reeve; 2. Badness as posteriority to capacity in metaphysics Theta 9 Jonathan Beere; 3. The good, the bad, and the ugly: natural teleology and its failures in Aristotle Stasinos Stavrianeas; Part II. Kakon in Aristotle's Practical Philosophy: 4. Radical evil in Aristotle's Ethics and Politics Pavlos Kontos; 5. Aristotelian demons Howard J. Curzer; 6. Aristotle on psychopathology Giles Pearson; 7. Aristotle on enduring evils while staying happy Marta Jimenez; 8. The political kakon: the lowest forms of constitutions Richard Kraut; Part III. The Presence of Aristotle in Post-Aristotelian Philosophy: 9. Plotinus against Aristotle on the problem of evil Paul Kalligas; 10. Being bad: Aristotelian resonances in Aquinas' conception of evil Kevin L. Flannery, S.J.; 11. Virtue and vice in Aristotle and Kant Stephen Engstrom; 12. Practical unintelligence and the vices Daniel C. Russell.