The answer, I believe, is this: As we continue to confound Soviet expectations, as our world grows stronger, more united, more attractive to men on both sides of the iron curtain, then inevitably there will come a time of change within the communist world. 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.