1. Introduction: assistance-based and contribution-based responsibilities to address global poverty; Part I. Assistance-Based Responsibilities: 2. Assistance-based responsibilities; 3. The implications of failing to assist; 4. Assistance-based responsibilities in the real world; Part II. Contribution-Based Responsibilities: 5. The doing, allowing and enabling distinction; 6. Giving rise to cost and the doing, allowing and enabling distinction; 7. The feasible alternatives thesis: Pogge on contribution-based responsibilities to the poor; 8. Contribution-based responsibilities and trade; Part III. Implications of Contribution: 9. The implications of contributing to global poverty; 10. Assuming responsibility for harm; 11. Contribution-based responsibilities and overdetermination.