become thine enemy?" "The enemy," as the object of social anger or repulsion, has throughout history been used as the prototypical propaganda tool to focus the fear and anxiety within a society toward a particular target. The target is often general, as with an ethnic group or race of people, or it can also be a conceptual target, as with an ideology which characterizes a particular group. In some cases the concept of the enemy have morphed; whereas once racial and ethnic claims to support a call to war may later have changed to ideological and conceptual based claims. During the Cold War, the terms "Communists" or "Reds" were believed by many in American society to mean "the enemy," and the meaning of the two terms could be extremely pejorative, depending on the political context, mood, or state of fear and agitation within the society at the time. There are many terms and phrases that allude to overlooking or failing to notice an enemy, such as Trojan horse or wolf in sheep's clothing. Generally, the counterpoint to an enemy is a friend or ally, although the term frenemy has been coined to capture the sense of a relationship wherein the parties are allied for some purposes and at odds with one another for other purposes. As a function of social science The existence or perceived existence of a collective enemy tends to increase the cohesiveness of the group. However, the identification and treatment of other entities as enemies may be irrational, and a sign of a psychological dysfunction. For example, group polarization may devolve into groupthink, which may lead members of the "in" group to perceive nonmembers or other groups as enemies even where the others present neither antagonism nor an actual threat. Paranoid schizophrenia is characterized by the irrational belief that other people, ranging from family members and personal acquaintances to celebrities seen on television, are personal enemies plotting harm to the sufferer. Irrational approaches may extend to treating impersonal phenomena not merely as conceptual enemies, but as sentient actors intentionally bringing strife to the sufferer. The concept of the enemy is well covered in the field of peace and conflict studies, which is available as a major at many major universities. In peace studies, enemies are those entities who are perceived as frustrating or preventing achievement of a goal. The enemy may not even know they are being