A warrior, a man of science, an artist or a poet are judged in the main by definite achievements, by the victories they have won over foreign enemies or over ignorance and prejudice, by the joy and enlightenment they have brought to the consciousness of their own and succeeding generations. For the statesman there is no such exact measure of greatness. The greater he is, the less likely is his work to be marked by decisive achievement which can be recalled by anniversaries or signalised by some outstanding event: the chief work of a great statesman rests in a gradual change of direction given to the policy of his people, still more in a change of the spirit within them.