We do not know how that change will come about, whether by deliberate decision in the Kremlin, by coup d'etat, by revolution, by defection of satellites, or perhaps by some unforeseen combination of factors such as these. But if the communist rulers understand they cannot win by war, and if we frustrate their attempts to win by subversion, it is not too much to expect their world to change its character, moderate its aims, become more realistic and less implacable, and recede from the cold war they began. Do not be deceived by the strong face, the look of monolithic power that the communist dictators wear before the outside world.