Until the beginning of the twenty-first century, historians’ aversion to sweeping generalisations meant that they typically conducted their research within the boundaries of the nation state. Following the fall of the Soviet Union, the rise of globalisation and the birth of the internet, new political, intellectual, and practical developments began to shape historical research. Historians working on national histories that were characterised by exceptionalist narratives consciously sought to challenge them, as in the case of Ian Tyrrell, Thomas Bender and Frank Ninkovich’s work on the history of the United States. With the advent of new digital archives, historians had the means and the motivation to seek better answers to explicitly transnational questions that could not be fully understood within the boundaries of a single nation state. Today, transnational historians are interested in the movements across borders of ideas, people and resources, and in sociopolitical processes that operate transnationally, such as race, gender, and class...