The "war on terrorism," writes historian Howard Zinn, has opened up the prospect of "a war without end." President Bush has already said that the war may not be finished during his administration. "He will pass on the war to the next president, and perhaps the next and the next," Zinn writes. "How useful to have an enemy who is so elusive, whose defeat will require an endless war. Because so long as the nation is in a state of war, it is possible to control the population by saying: we are at war, and this is no time for division, we must sacrifice our freedoms.