On 11 January 1910 Lord Esher, a permanent non-government member of the Committee of Imperial Defence and a close confidant of King Edward VII, dispatched these encouraging words to a relatively unknown journalist: ‘Your book can be as epoch making as Seeley's Expansion of England or Mahan's Sea Power. It is sent forth at the right psychological moment, and wants to be followed up.’ The recipient of the letter, a Mr Ralph Lane (better known under the pseudonym of Norman Angell), had just begun to receive recognition for his small monograph, Europe's Optical Illusion, later revised and expanded into its more celebrated version, The Great Illusion. Esher's words were prophetic. The Great Illusion ran into numerous editions: it sold over two million copies from 1910 to 1913, in 1939 over half a million, and was translated into twenty-five languages.