In this essay, Bonfreschi and Maccaferri consider the concept of regionalismfrom a subnationalperspective rather than an internationalone, discussing the problem of how states deal with regions or smaller unities within the state.In this essay,\~Bonfreschi and Maccaferri\~consider the concept of regionalismfrom a subnationalperspective rather than an internationalone, discussing the problem of how states deal with regions or smaller unities within the state. From this perspective regionalismis a notoriously imprecise term-used to describe everything from decentralization of political power via \~economic restructuring to the mobilization of subnational identities-but it is undeniable that starting from the 1960s western Europe has experienced a true and proper re-emergence of territorial cleavage.The History of Regions in the Modern World Series IntroductionIntroductionFrom the Centre to the Periphery: Scotland and Wales versus EnglandFrom the Rediscovery of Subnational Identities to Their PoliticizationThe Thatcher Era: A Prelude towards Devolution and a New FractureThe Case of Belgium: The Federalization of the Political System and of the StateThe Sixties: The Re-Emergence of Territory in PoliticsThe End of the Unitary StateItaly: From the Southern to the Northern QuestionFrom the Local Movements to the LeaguesThe Northern League and the Northern QuestionSpain: Centre-Periphery-the Epitome of Cleavage?Autonomism between Authoritarian Fatalism and Democratic TransitionThe Territorial Question in Spanish DemocracyRegionalism as a Post-Industrial Political Culture? Some ConclusionsNotesLucia Bonfreschi is assistant professor of political history at IMT Institute for Advanced Studies Lucca (Italy). She is also adjunct professor of History of Political Institutions at Luiss-Guido Carli University in Rome. She has written a book on Raymond Aron e il gollismo 1940-1969 (Rubbettino, 2014) and many articles and papers on French political and intellectual history (19th and lÍ