"Libertarians have always battled the age-old scourge of war. They understood that war brought death and destruction on a grand scale, disrupted family and economic life, and put more power in the hands of the ruling class - which might explain why the rulers did not always share the popular sentiment for peace. Free men and women, of course, have often had to defend their own societies against foreign threats; but throughout history, war has usually been the common enemy of peaceful, productive people on all sides of the conflict."