Empirical analysis of two decades of pioneering pension and social security reform in Latin America and the Caribbean shows that much has been achieved, but that critical challenges remain. In tackling this unfinished agenda, a great deal can be learned from the reform experience of countries in the region. 'Keeping the Promise,' produced by the chief economist's office for the Latin America and Caribbean region at the World Bank, evaluates policy reforms in 12 countries, points to successes and shortcomings, and proposes priorities and options for future reform.