Available scholarship on civil–military relations, and coup politics in particular, tends to treat military coups d’état as originating purely within the minds of military officers; that is, the overwhelming bulk of scholarship assumes that the idea to seize power stems from officer cliques. To the extent that societal factors (e.g., polarization, economic decline, party factionalism) explain coups, they merely account for why officers decide to seize power. Most research that discusses civilian support for coups does so within single case studies—almost entirely drawn from the Middle East and North Africa. Building on a vibrant wave of studies that disaggregates civil–military institutions, a small body of recent research has begun to systematically and comprehensively consider the theoretical and empirical importance of civilian involvement in military coups. This perspective deemphasizes the military’s possession of weapons and instead focuses on ideational sources of power. Civilians have more power and resources to offer military plotters than existing scholarship has given them credit for. Civilian elites and publics can legitimate coups, organize them, manipulate information on behalf of the plotters, and finance coups for their own economic interests. In short, to fully understand coups, one must seek as much knowledge as possible about their formation, including where the idea for each plot originated. Such detailed analysis of coup plots will give researchers a clearer picture about the motivating factors behind coups.