 Questions relating to Stoic psychological monism have been most widely discussed with a view to the theory of the emotions—here, it makes a great difference whether we think that irrational desires can overcome reason, or are irrational acts of the rational soul. Seneca’s treatment of the emotions has been scrutinized for indications of both points of view. Sorabji interprets Seneca as situating his account of the emotions vis-à-vis early and middle Stoic theories that differ from his own (1989); Fillon-Lahille studies On Anger with source-critical methods (1984). According to others, On Anger can be studied as a treatise on emotion that is basically in agreement with Stoic psychological monism, and appreciated for the detailed treatment that Seneca devotes to this, as he sees it, particularly violent emotion (Cooper 1999; Vogt 2006).