The essays in this volume arise from a recent convergence of interest in the history of international health and welfare organisations. The sheer diversity of organisations and their many-sided activities make this a rich and complex area of historical investigation, which has direct relevance to current issues in international health

Although contributors to this volume are dispersed throughout the world, an informal network arose in what is very much a new field of study. I therefore wish to express my appreciation of how contributors have co-operated to bring this volume to fruition within a relatively short period of time. The exchange of papers meant that there was much interchange on topics of mutual interest, while perspectives have remained refreshingly diverse. I am particularly indebted to contributors for comments on my introduction and my essay on social medicine. It meant that arguments were refined, and, in order to avoid duplication of analysis on central issues, several contributors generously agreed to omit material dealt with elsewhere in the volume. Their efforts have meant that an exceptionally cohesive, integrated and intellectually coherent volume has taken shape. It is hoped that this collection will provide solid foundations for other projects on twentieth-century international health that are already under way.