How do you deal with a bully without becoming a thug? In this wise and soulful talk, peace activist Scilla Elworthy maps out the skills we need — as nations and individuals — to fight extreme force without using force in return. To answer the question of why and how nonviolence works, she evokes historical heroes — Aung San Suu Kyi, Mahatma Gandhi, Nelson Mandela — and the personal philosophies that powered their peaceful protests.