Many nations, peoples and special interest groups believe that violence will advance their cause. Warfare has changed greatly since the Second World War; it continued to change during the late 20th century and this process is still accelerating. Political, technological, social and religious forces are shaping the future of warfare, but most western armed forces have yet to evolve significantly from the cold war era when they trained to resist a conventional invasion by the Warsaw Pact. America is now the only...