Jonathan Schell's The Unconquerable World is extremely powerful. One of the best books I've read in decades.

If you want to know how nonviolent political mass action based on consent has been at the root of even supposedly violent revolutions through history, etc. If you want to know how Gandhi relates to (& differs from) Clausewitz & Mao etc. If you want to understand the nature of & relations between political movements, violence, nonviolence, satyagraha, insurgency, war, weapons of mass terror, etc. This book is superb, profound, superlative, great. It will enlighten & turn your head around.