Anger has had a major hand in a history of inhumanity. In this light, some schools of thought have suggested that we do best to jettison anger entirely. However, anger, like grief, is tied to caring deeply, and as such, both emotions can speak to what is best and most beautiful about human life and character.
Anthony Cunningham (2005). Great Anger. The Dalhousie Review 85 (3): 353-369.