This chapter canvasses coalitions for and against pluralism that emerged with the foundation of the Republic of Turkey. It shows that while the early nation-builders pursued a unitary, ethno-nationalist project, Kemalism also entailed an “embedded liberalism” inherited from late Ottoman modernization, including resources for eventual democratization. Throughout the twentieth century, political actors sought to mobilize these resources toward pluralizing the political system across a series of critical junctures (e.g., the 1920s’ cultural revolution; the 1950 transition to multiparty democracy; successive coups in 1960, 1971, and 1980; and a 1997 “postmodern coup.”) Across these junctures, the chapter argues, there were only two pronounced periods of secularist/Islamist cleavages. More often, conflict was driven by significant, cross-camp cooperation and intra-camp rivalry. Tracing when and why pluralizing and anti-pluralist alignments succeeded or failed, the chapter captures a key dynamic: the installation of an ethno(-religious nationalist project – the Turkish-Islamic Synthesis (TIS) – as national project, even as ideas and actors invested in pluralization continued to mobilize.