Preface; Part I. Breakdowns of Will: The Puzzle of Akrasia: 1. Introduction; 2. The dichotomy at the root of decision science: do we make choices by destres or by judgments?; 3. The warp in how we evaluate the future; 4. The warp can create involuntary behaviors: pains, hungers, emotions; Part II. A Breakdown of the Will: The Components of Intertemporal Bargaining: 5. The elementary interaction of interests; 6. Sophisticated bargaining among internal interests; 7. The subjective experience of intertemporal bargaining; 8. Getting evidence about a nonlinear motivational system; Part III. The Ultimate Breakdown of Will: Nothing Fails Like Success: 9. The downside of willpower; 10. An efficient will undermines appetite; 11. The need to maintain appetite eclipses the will; 12. Conclusions; Notes; References; Indexes.