In national movements the spectrum of individual rebels is apt to be sufficiently wide to include all types and professions. Even those who have something to lose if the cause succeeds - privilege or power - are often represented, certainly by their children. Those movements driven by an ethnic dream or a religious vision may also involve all sorts - but not always; some ethnic loyalists exclude their own on varying grounds, place or class or habit, and some fundamentalist aspirations appeal only to those denied more opportunity in more established denominations or societies or systems. Some individuals are denied places not as representative of a group but because of personal animosities, character flaws, special reasons. What all share who enter a classical underground is a sense of grievance, a feeling that history is askew, and that the only way into a satisfactory future is by means of an armed struggle.