Charles Henry Alexandrowicz (1902-1975) was a Polish scholar who pioneered research in the critical history of international law in the 1950s and 1960s. His works included World Economic Agencies, Law and Practice (1962); An Introduction to the History of the Law of Nations in the East Indies (1967); The Law of Global Communications (1971); and The Law-Making Functions of the Specialised Agencies of the United Nations (1973). David Armitage is the Lloyd C. Blankfein Professor of History at Harvard University, where he teaches intellectual and international history. He is also an Affiliated Faculty member at Harvard Law School and an Affiliated Professor in Harvard's Department of Government. Among his publications are The Ideological Origins of the British Empire (2000), The Declaration of Independence: A Global History (2007), Foundations of Modern International Thought (2013), The History Manifesto (co-auth., 2014), and Civil Wars: A History in Ideas (2017). Jennifer Pitts is Associate Professor of Political Science at the University of Chicago. She is author of A Turn to Empire: the rise of imperial liberalism in Britain and France (2005) and editor and translator of Alexis de Tocqueville: writings on empire and slavery (2001). She is currently completing a book,Boundaries of the International, that explores European debates over legal relations with extra-European societies during the eighteenth and nineteenth centuries.