Anger is intimately involved with both military prowess and loyalty: it provides the kind of psychic energy necessary to perform brutal acts, and so is bound up with success on the battlefield. But it also involves a socially constructed notion of worth, which is a focus for honour. When Plato argues in Republic Book IV that the characteristic emotion of an honour-lover is anger (thumos), he is recognising how central to the world of honour anger really is.
C. D. C. Reeve
anger, anger-and-attitude, anger-righteousness-vengeance