1. Introduction: taking stock of Latin America's expansionary phase; 2. Latin America: historical problems, recent expansion; 3. Conceptualizing and measuring social policy expansion: perspectives from the literature; 4. The character of policy change: segmented expansion; 5. Explaining segmented expansion: democracy, the boom, and policy legacies; 6. Explanatory factors that deserve further study; 7. Social policy after the expansionary era – what's next?; 8. Conclusion: what we have learned as a compass for the future; References.