This introduction to the history of the world wide pattern of British activity in the 19th century, embraces its expansive spirit as well as its formal territorial empire. The dynamics of this enterprise are considered broadly: the high political concerns of strategy and international geopolitics are analyzed, as well as the economic dimension, missionary activity, and racial attitudes, together with a wide range of cultural aspects, including sport and the pursuit of sexual opportunity. Nor is the personal contribution of some of the leading Victorian figures neglected.