Headhunters traces the intellectual journey of four men who met at Cambridge in the 1890s and whose lives and carreers interlinked for the next three decades - William Rivers, Grafton Elliot Smith, Charles Myers and William McDougall. It starts with the neuroscience of their day and follows their voyages of discovery in peace and war, taking the reader from anthropological field studies in Melanesia and archeological excavations in Egypt to the psychiatrics wards of the First World War, when all four men specialised in the treatment of shell shock. Their work ranged across fields that today carry a variety of labell - neurology, psychology, psychiatry, zoology, anthropology - but which for these men formed part of the same enquire: the search for the science of the mind.