But the development and proliferation of nuclear weapons and the mastery of guerrilla warfare gradually brought an end to such large-scale conflicts. During the Cold War, small insurgencies grew in number and drawn-out conflicts that often targeted civilian targets became the rule. Since the collapse of the Soviet Union, however, frustrated militants of all stripes have developed a new tactic. They use fear and brutality and a willingness to destroy any who are not totally with them. This kind of violence is not unique to this time.
World history contains numerous tales of similar acts.
But in this era, they seem anachronistic, a throw back to a dark age. There are many reasons behind the rise in these acts of terror. In a media age, random acts attract attention. Alienation caused by disparities of wealth and power is at an all-time high. Government and social apparatus appear colossal and unchangeable.