The book traces the history of international humanitarianism from the anti-slavery movement to the end of the cold war. It is based on an extensive survey of the international literature and is retold in an original narrative that relies on a close examination of the sources. The reconstruction of humanitarianism's long history unfolds around some crucial moments and events: the colonial expansion of European countries, the two world wars and their aftermaths, the emergence of a new postcolonial order. In terms of its contents, narrative style, interpretative approach the book is aimed at a large and diverse public including: scholars who are studying and teaching humanitarianism; students who need to learn about humanitarianism as part of their training or research; operators and volunteers who are engaged in the field; non-specialist readers who are interested in the topic because of its relevance to current events.