Cornell law professor Sherry F. Colb discusses the criminal defenses of self-defense and defense of others and considers what role emotions should and do play in society’s assessment of whether a person’s violent conduct is justified and thus not criminally punishable. Colb argues that fear, rather than anger, most clearly motivates legitimate uses of self-defense or defense of others, but the mere fact of the victim’s anger (which might be present in addition to fear) should not necessarily mean the victim is criminally culpable.