Existing theory associates ethnolinguistic diversity with a host of negative outcomes. This article analyzes the puzzle of Ghana, the 12th most diverse state globally, yet among the most peaceful, democratic, and developed African states. It argues the position of post-independence political elites within ethno-demographic structures helps explain why some diverse African states pursued broad nation-building public goods, mitigating the political salience of diversity. Diversity encouraged provision of social goods with broad-based support in states with a modest plurality—not large enough to dominate, but without proximately sized ethnic groups—especially for leaders from a minority. Comparative historical analysis of Ghana is expanded with abbreviated case studies on Guinea, Togo, and Kenya.