Diego’s main research interests are popular politics, citizenship, protest policing, political development and state building in the Iberian Peninsula during the nineteenth and twentieth centuries, while he tries to keep up to date with European and Atlantic political history more generally. Diego has a strong background in comparative politics and in gender history, and he has also written about police change and protest policing during democratization processes. He began his career looking at the more recent transitions to democracy in Southern Europe, but he gradually became more interested in the long nineteenth century.
Diego’s first book, O Poder caiu na rua (Lisbon, 2003) dealt with popular movements in Portugal after de 1974 Carnation revolution. His second book, Portugal à Coronhada (Lisbon and Palma de Mallorca, 2011) is a history of the interaction between State building, popular protest and policing in Portugal during the nineteenth and twentieth centuries. Since 2009 Diego has been working on a comparative history of the forms of political action in Spain and Portugal during the long nineteenth century –from rioting to petitioning and voting– and this explores the intersections between tradition, international diffusion, gender roles, state building and the emergence of a post-revolutionary political culture. In addition, he is now giving form to a wealth of comparative material for a short book on a transnational history of collective petitioning.