who has given the concepts of ingroup and outgroup
Ingroups and outgroups The terminology was made popular by Henri Tajfel and colleagues during his work in formulating social identity theory. The significance of ingroup and outgroup categorization was identified using a method called the minimal group paradigm. Tajfel and colleagues found that people can form self-preferencing ingroups within a matter of minutes and that such groups can form even on the basis of seemingly trivial characteristics, such as preferences for certain paintings.[1][2][3][4][5]
Nations of Nineteen Eighty-Four The ruling doctrine of Oceania is Ingsoc, the Newspeak neologism for English Socialism. Its nominal leader is Big Brother, believed by the masses to have been the leader of the revolution and still used as an icon by the Party. The cult of personality is maintained through Big Brother's function as a focal point for love, fear, and reverence, more easily felt towards an individual than towards an organization.