Social movements are at once the symptoms and the instruments of progress. Ignore them and statesmanship is irrelevant; fail to use them and it is weak.
Source: A Preface to Politics, ch. 9 (1914).
-- Walter Lippmann, (Sep 23 1889-1974), US journalist, editor, author; He won Pulitzers 1958, 1962, for his syndicated column, Today and Tomorrow.