Vitor Izecksohn is professor in the Graduate Program of Social History at the Federal University of Rio de Janeiro. He has a PhD in History from the University of New Hampshire and did his postdoc at Brown University where he also served as a visiting professor under a Fulbright Fellowship in 2011. He was a Fellow at the Gilder Lehrman Institute of American History (New York Historical Society), the Gilder Lehrman Center for the Study of for the Study of Slavery, Resistance, and Abolition (Yale University), and the Fred W. Smith National Library for the Study of George Washington. Prof. Izecksohn was also a fellow at the John Carter Brown Library (2016) and the Max Planck Institute for the Study for European Legal History. He served as visiting professor at the Elliott School of International Affairs/George Washington University. Izecksohn is the author of, Slavery and War in the Americas: Race, Citizenship, and State Building in the United States and Brazil, 1861- 1870 (University
of Virginia Press, 2014), as well as two earlier books published in Brazil: A History of the Brazilian Liberal Political Thought in the Twentieth Century (1990), and The Chorus of Disagreement: The Paraguayan War and the Professional Nucleus of the Brazilian Corps of Officers(2002). He co-authored Nova História Militar Brasileira (2004). These books, along with his chapters and journal articles, engage in renewed debates about the New Brazilian Military History, Comparative Colonial History, and the process of internationalization in the American Civil War.

PhD in Social History at Universidade Federal do Rio de Janeiro, Roberto Guedes is Associated Professor of History at Universidade Federal Rural do Rio de Janeiro and Collaborator-Professor at the Graduate Program of Social History of the Universidade Federal do Rio de Janeiro. He is author and (co)editor of Egressos do cativeiro: trabalho, família, aliança e mobilidade social (2008); Dinâmica imperial no Antigo Regime Português: escravidão, governos, fronteiras, poderes, legados (séculos XVII-XIX) (2011); África: brasileiros e portugueses (séculos XVI-XIX) (2013); Doze capítulos sobre escravizar gente e governar escravos: Brasil e Angola, séculos XVII-XIX (2017); e Memórias da escravidão em mundos ibero-americanos: séculos XVI-XXI (2019). His studies focus on Brazil of Ancient Regime and pre-colonial Angola, mainly issues about slavery, economy and social hierarchies.

With a Ph.D. in Social History from Universidade Federal Fluminense (1990), João Luiz Fragoso holds a B.A. and a Master’s Degree in Social History (with emphasis on Agrarian History of Brazil) from the Universidade Federal do Rio de Janeiro (1979 and 1982), where he is, since 2005, full professor. He researches and teaches in the field of Early Modern History, with an emphasis on the History of Colonial Brazil, mainly on the following themes: Portuguese Empire, American slavery, Ancient Regime and economic and social elites. He has coordinated and collaborated in several international research projects on the Portuguese colonial empire in the modern era, including with the Institute of Social Sciences at the University of Lisbon and l’École des Hautes Études en Sciences Sociales (EHESS).