"Questions about what motivates the terrorist have been asked for a long time and the answers have varied enormously. This is hardly surprising, for terrorism has appeared in many different guises and has varied greatly in character from age to age and from country to country. Any explanation that attempts to account for all of its many different manifestations is bound to be either exceedingly vague or altogether wrong. It has been said that highly idealistic and deeply motivated young people have opted for terrorism when they faced unresolved grievances and when there was no other way of registering protest and effecting change. Dostoyevski and many others would hardly have agreed. It has also been said that terrorists are criminals, moral imbeciles, mentally deranged people or sadists (or sado-masochists). Sweeping definitions of this kind are bound to provoke skepticism. Terrorist movements are usually youth movements of sorts, and to dwell upon the idealistic character of youth movements is only stressing the obvious: they are not out for personal gain and they always oppose the status quo. But political goals are not necessarily wholy altruistic, idealism and interest may coincide. Nor are personal ambitions absent; terrorists have also been driven by impatience and a kind of machismo (or, more recently, its female equivalent). Terrorism has occurred with increasing frequency in societies in which peaceful change is possible. Grievances always exist, but at certain times and in certain places major grievances have been borne without protest, whereas elsewhere and at other times relatively minor grievances have resulted in violent reaction. Nor is the choice of terrorism as a weapon altogether obvious, for frequently there are other ways of resistance, both political and military."