Although democratic governments have introduced a number of institutional reforms in part intended to increase citizens’ political involvement, studies show a continued decline in regular political engagement. This book examines different forms of political participation in democracies, and in what way the delegation of public responsibilities—or, the diffusion of politics—has affected patterns of participation since the 1980s. The book addresses this paradox by directly investigating the impact of institutional changes on citizens’ political participation empirically. It re-analyses patterns of political participation in contemporary democracies, providing an in-depth time series cross-sectional analysis that helps develop a better understanding of how variation in political participation can be explained, both between countries and over time. As such, it develops an institutional theoretical framework which can help to explain levels of participation and shows that, instead of displaying more political apathy, citizens have reallocated or displaced their activities to a broader array of forms of participation. This book will be of key interest to students and scholars of comparative politics, democratization, political participation and electoral politics.