There is also the problem that through time some individuals, formerly recognized as terrorist leaders, have become something else, from George Washington of the American colonies to more recently Anwar Sadat of Egypt, Yasir Arafat of the PLO (Palestinian Liberation Front), Menachem Begin of Israel, and Nelson Mandela of South Africa.
Clearly terrorism is not reducible to simply senseless violence or evil. Often underlying the desperate acts of terrorism, apparently random and extraordinary violence against innocent civilians, is a desperate frustration with prolonged injustices wherein no alternative remedy appears available and effective. Terrorism is a form of violence that ignores conventional distinctions between guilt and innocence, and/or, combatants and noncombatants. The victims of terrorism are a means to confront a target--- government policy or public opinion (500).
Since the 1880s, there have been four major waves of terrorism on the international scene, each with its own particular characteristics, main purpose, and peculiar techniques. Each of the first three waves lasted for only about