This book is the result of a collective re¬flection among scholars from 8 federations and decentralized countries (Argentina, Australia, Brazil, Canada, Ethiopia, Germany, Italy, Mexico) who sought to update approaches and arguments on federalism in a post-COVID-19 scenario. On one hand, the pandemic highlighted the importance of federalism to deal with complex intergovernmental problems. On the other hand, federations also faced challenges to coordinate different spheres of government. The pandemic has allowed intense learning about the potential and limits of multilevel governance and federal arrangements in addressing emergencies and crises whose effects spread throughout the country. Regarding contemporary challenges such as climate emergency and democratic backsliding, which take on particular contours in federal, quasi-federal, and decentralized countries, the book offers insightful thoughts for scholars and practitioners. Federalism and federal countries can be pivotal in this debate due to their form of territorial division of power. This volume seeks to contribute to these discussions based on thoughts grounded on different national settings. The volume is organized in 16 chapters that contemplate essential topics on federalism and federations, based both on theoretical refl¬ections and empirical research. The chapters were mainly organized to offer for the authors a comparative perspective between the international debate and the Brazilian context. The book covers central issues such as federalism and institutional forms, federalism and democracy, federalism and de/centralization, managing interdependences and intergovernmental relations, federalism and ethnic diversity and federalism and challenges for the welfare state. Although this book is subject to the scrutiny of time, in line with changes in federations themselves, both organizers and authors aspire to provide ongoing debates with insightful contributions on Federalism and Democracy in Brazil and Beyond. This book is an essential reading for students and scholars of federalism, intergovernmental relations, multilevel governance and comparative politics.