The British empire, George Orwell wrote, was "despotism with theft as its final object". So what has made imperialism an intellectual fashion in our own time, reopening hoary disputes about whether it was good or bad?
As a colonial policeman in Burma, where he found himself shooting an elephant to affirm the white man's right to rule, Orwell was convinced that the imperial relationship was that of "slave and master". Was the master good or bad?