Ethnic minorities make contemporary Europe increasingly diverse. The wisdom in research on ethnicity is that it is a trouble-maker disrupting programmatic politics, prioritizing group identity over ideology, polity over policy, principle over compromise. In this book, Jan Rovny approaches ethnic politics as normal politics, and investigates the ideological potential of ethnicity. He shows that ethnic minorities often search for group preservation by championing liberal rights that would protect them from the tyranny of the majority. This translates into broader ideological preferences and political behavior, including the formation of liberal political poles, which in turn configures political cleavages, shapes party systems, and informs the absorption of new political issues. Ultimately, the presence of ethnic minorities can be a force for liberal democracy. Simultaneously, ethnic liberalism is circumstantial, as conditional factors cross-pressure ethnic minority search for rights and liberties, potentially attenuating ethnic liberalism and inducing exclusionary particularism. This book combines the study of ethnic politics with research on electoral behavior and party competition, while comparing minorities and majorities in eastern Europe. The book analyzes existing and new data using mixed experimental, quantitative, and qualitative methods. The empirical chapters in the book are organized into two parts, one focusing on large-N comparative analyses, while the other presents three in-depth case studies on interwar Czechoslovakia, contemporary Slovakia, and contemporary Estonia.