Nonviolence: first approach, ethically good, but stops working when you're getting punched in the face
Violence: last resort, ethically bad unless necessary in which case neutral, what people actually do when they don't see better options
Threat of violence: technically nonviolence, but adversarial; show of force, art of war, etc
Least violence: acknowledging that we live in a world of violence, acting to create as little as possible
(Paraphrasing last #fightLikeAnAnimal podcast)