Every age has had its rebels: socialists, peace activists, sexual reformers, fundamentalists, and more. The collections of the International Institute of Social History (IISH) in Amsterdam are full of them. The IISH is the world’s largest documentation centre in the field of social history and emancipation movements. This book looks back on seventy-five years of the IISH and its collections, with a focus on creative ideas and people who fought for radical change, from Karl Marx to Aung San Suu Kyi, the French Revolution to the Chinese student revolt of 1989, from the early modern world explorers to today’s anti-globalists.