Arno Gruen (May 26, 1923 – October 20, 2015) was a Swiss-German psychologist and psychoanalyst.Gruen's place in the history of psychology can be summarized as follows. According to Sigmund Freud, human beings are born with an innate tendency to destruction and violence; throughout his scholarly and clinical career, Prof. Gruen challenged that assumption, arguing instead that at the root of evil lies self-hatred, a rage originating in a self-betrayal that begins in childhood, when autonomy is surrendered in exchange for the "love" of those who wield power over us.

To share in that subjugating power, people create a false self, a pleasing-to-others image of themselves that springs from a powerful, deep-seated fear of being hurt, humiliated or abandoned. Gruen traced this pattern of over-adaptation, and the fate of those who resist the pressure to conform, through a number of case studies, sociological phenomena—from Nazism to Reaganomics—and literary works. The insanity of rage and numbness that this hyper-conformity produces, unfortunately, goes widely unrecognized precisely because it has become the cold, tough "realism" that modern society inculcates into its members and even admires.

Gruen warned, however, that escape from these patterns lies not simply in rebellion, for rebels often remain emotionally tied to the objects of their rebellion, but in the development of a personal autonomy and a relinquishing of all forms of self-numbing and self-deception. His elegant and far-reaching conclusion, elaborated in the books and essays,is that while autonomy and authenticity are not easily attained, their absence proves catastrophic to both the individual and society as the embittered conformists seek new victims on whom to wreak violence and avenge their psychic wounds.