Leo Amery was a leading British Imperialist who played a pivotal role in the fall of Neville Chamberlain and the rise of Winston Churchill. In the Name of God, Go! was Amery's famous exhortation to Chamberlain in May 1940. In this study, Roger Louis, a noted historian of Britain in the 20th century, portrays Amery's part in those great events as well as in the evolution of the British Empire and Commonwealth. Amery believed that subject peoples could not be held in the British Empire against their will. He helped, at first reluctantly, to prepare the way for the transfer of power in India and to advance the movements of national independence in Asia and Africa. Professor Louis's narrative traces the close association of Amery and Churchill from their school days at Harrow to the clashes over India that nearly broke their friendship.