In the last two decades, the emergence of an international good governance agenda has fostered the implementation of anti-corruption efforts in several countries. Nevertheless, recent assessments of those efforts reveal that the vast majority of initiatives have not produced concrete positive results. Only a few countries have made considerable progress in reducing corruption, and there is still limited knowledge about what has determined their positive experiences. This paper attempts to contribute to this discussion by engaging in a comparative analysis of six countries that have improved in terms of control of corruption. These countries are: Uruguay, Estonia, Botswana, Taiwan, South Korea and Ghana. The framework for analysis is based on a model of corruption as a function of power discretion, material resources and legal and normative constraints (Mungiu-Pippidi, 2010). Additionally, particular attention is paid to the role of political agents as drivers of change, with a focus on political leaders, civil society, media and enforcement institutions.