There is a tradition of participant history among historians of the Pacific Islands, unafraid to show their hands on issues of public importance and risking controversy to make their voices heard. This book explores the theme of the participant historian by delving into the lives of J.C. Beaglehole, J.W. Davidson, Richard Gilson, Harry Maude and Brij V. Lal. They lived at the interface of scholarship and practical engagement in such capacities as constitutional advisers, defenders of civil liberties, or upholders of the principles of academic freedom. As well as writing history, they made history, and their excursions beyond the ivory tower informed their scholarship. Doug Munro’s sympathetic engagement with these five historians is likewise informed by his own long-term involvement with the sub-discipline of Pacific History.