This work investigates the structural evolution, administrative practices, and political influence of the British diplomatic service during the eighteenth century. D. B. Horn, a noted historian of the period, utilizes extensive archival research to map the transition of diplomatic roles from personal royal appointments to a more formalized state bureaucracy. The text argues that the professionalization of the service was essential to Britain's rising status as a global power during this critical century of expansion and conflict.

Historians frequently cite this text as a foundational reference for understanding the mechanics of early modern British foreign policy. Scholars note the academic density of the prose, which provides a comprehensive look at the institutional development of the diplomatic corps.