Stefano Bellucci is a Lecturer at the Institute for History of Leiden University, the Netherlands, and a Senior Researcher at the International Institute of Social History, the Netherlands.Holger Weiss is Professor of General History at Åbo Akademi University, Finland, and Guest Professor of History at Dalarna University, Sweden.

• 1 Introduction: Stefano Bellucci and Holger Weiss. 1919 and the Century of Labour Internationalisation.- Part 1: Global Dimensions and Universal Issues 2 Dimitris Stevis. Global Union Organizations: The Weight of History and the Challenges of the Present, 1889–2019.- 3 Geert Van Goethem. The Guest who Invited Himself: The International Free Trade Union Movement during and between the Two World Wars.- 4 Eileen Boris. Woman’s Labours and the Definition of the Worker: Legacies of 1919.- 5 Susan Zimmermann. Framing Working Women’s Rights Internationally: Contributions of the IFTU Women’s International.- 6 Fredrik Petersson. The Labour and Socialist International and ‘the Colonial Problem’: Mobilization by Necessity or Force, 1925–28.- 7 Holger Weiss. ‘Unite in International Solidarity!’ The call of the International of Seamen and Harbour Workers to ‘colonial’ and ‘Negro’ seamen in the early 1930s.- Part 2: Global South, Regional and National Perspectives.- 8 Lucas Poy. Working Class Politics and Labour Internationalism in Latin America: An Overview of Labour International Organizations in the Region during the Interwar Period, 1919–1939.- 9 Larissa Rosa Corrêa. Beyond International Solidarity: The US Anti-Communist Labour Policy in Brazil during the Cold War.- 10 Christian Høgsbjerg. ‘Whenever Society is in Travail Liberty is Born’: The Mass Strike of 1919 in Colonial Trinidad.- 11 Andrés Stagnaro and Laura Caruso. The ILO as a Domesticating Arena: Argentinian Trade Unions and Workers’ Representations at the ILO in the First Half of the Twentieth Century.- 12 Peter Cole. Strange Bedfellows but Not for Long: The Industrial Workers of the World and the Communist International.- 13 Limin Teh. The ILO and the Labour Question in Republican China, 1919–1938.- 14 Venkatanarayanan Sethuraman. United to Struggle or Struggling to Unite: Growth and Diversification of Indian Labour Movement.- 15 Silke Neunsinger and M.V. Shobhana Warrier. Transnational Activism and Equal Remuneration in India in Twentieth Century.- 16 Stefano Bellucci. The Ascent of Labour Internationalism in Africa: Trade Unions, Cold War Politics and the ILO, 1919-1960.- 17 Duncan Money, The Struggle for Legitimacy: South Africa’s Divided Labour Movement and the ILO.- 18 David Meyer and Marcel van der Linden, Labour Internationalism in Context.