This essay introduces a review dossier dedicated to Daniel Laqua's Activism across Borders since 1870: Causes, Campaigns and Conflicts in and beyond Europe (London, 2023). The dossier features comments by four historians – Constance Bantman, Georgina Brewis, Nicole Robertson, and Mark Hurst – as well as a response from Laqua himself. Laqua's book provides a framework for studying different forms of transnational activism in connection to one another.

Chapter Four of Daniel Laqua's Activism across Borders, on “Class, Revolution and Social Justice”, opens stimulating avenues for reflection with its cross-partisan approach, over an ambitious chronological span – from the post-1848 wave of revolutionary exile to the contemporary global justice movement. From the perspective of a historian of pre-1914 transnational anarchism, this brief review essay considers three prominent aspects of this chapter: historiographic perspectives on socialist activisms; the modalities of transnational activism; and borders and boundaries.

This essay engages with Daniel Laqua's book Activism across Borders since 1870: Causes, Campaigns and Conflicts in and beyond Europe (London, 2023) from the perspective of a historian of both humanitarianism and youth. This short reflection therefore focuses primarily on the book's engagement with the topic of humanitarianism, before discussing an understated, albeit important, cross-cutting theme of the book: the significance of youth in transnational activism. It highlights a number of features of Laqua's book, for instance the merits of adopting a broad chronological approach. At the same time, the essay also uses the space to present a number of reflections on activism, from questions about the generational appeal of particular causes to the way in which particular figures might spark activism. It ends with some thoughts about the source base used to write such histories of activism.

Daniel Laqua's Activism across Borders since 1870 is an impressive contribution to scholarly research on transnational activism. It provides a detailed and innovative study of the connections but also the divisions between individuals, groups, and organizations. Laqua's approach and analysis interrogate the connectedness, transience, ambivalence, and marginality of transnational activism. He explores the complex relationship of campaigners, campaigns, and causes that crossed national boundaries, building a rich analysis of these interactions.

This contribution engages with Activism across Borders with a particular emphasis on women, workers, and women workers. This perspective offers an analysis at the intersection of women's history and labour history. Among the themes considered are: campaigns that forged partnerships and amplified voices; women's transnational activism and national borders; and the divisions and differences among activists campaigning to improve working conditions.

Daniel Laqua's recent monograph Activism across Borders Since 1870: Causes, Campaigns and Conflicts in and beyond Europe raises a number of pertinent issues for historians of human rights to reflect upon. This article takes the four analytical lenses highlighted by Laqua for assessing transnational activism and applies them to cases of human rights activism in the Cold War and post-Cold War era. In doing so, this article argues that Laqua's framework offers much scope for historians to approach the history of human rights activism with a more critical edge. It also highlights the challenge of retaining an analytical focus on an issue as emotive and complex as human rights, and how Laqua's lenses may offer a practical methodology to do this.

This essay discusses different approaches to studying transnational activism in historical perspective. In doing so, it concludes a review dossier in which several historians have commented on aspects of Daniel Laqua's book Activism across Borders since 1870: Causes, Campaigns and Conflicts in and beyond Europe (London, 2023). The author responds to the preceding pieces by addressing the contributors’ questions and arguments, while also noting how their pieces have applied his book's framework to different causes (e.g. anarchism, feminism, human rights, humanitarianism, labour). Moreover, this essay raises several wider points regarding the subject under consideration. For example, it stresses that activists’ notions regarding the interconnectedness of different causes could generate fresh ruptures. The discussion highlights the amorphous nature of transnational activism, including its potential use by vastly different movements, and it situates the book within a broader, and developing, research agenda.