once he discovered the tendency of individuals to differentiate between the in-group et al. He represented it as typically resulting in pride, vanity, beliefs of one’s own group’s superiority, and contempt of outsiders (John T. Omouhundro, 2008). this will even be seen within the case on social identity theory by Tajfel (1979). He projected that the teams which individuals belonged to were a crucial supply of pride and vanity. teams offer United States of America a way of social identity: a way of happiness