This is a very important and highly original contribution to the literature on presidentialism and electoral institutions, by a distinguished scholar of Latin American politics. Questioning prevailing academic wisdom, and systematically weighing the evidence from Latin America with multiple methods, Cynthia McClintock shows that runoff election rules are clearly superior to the plurality system for electing presidents. Runoff elections do in fact produce what could be logically predicted: more legitimate and ideologically moderate presidents, and a higher quality and vitality of democracy. This powerful finding should significantly shape not only academic analysis but also future thinking about institutional design and reform.