When was the last time you had to check the "other" box during a survey? Social Identity Theory, developed by Henri Tajfel in the 1970s, explains how people define themselves through group memberships like nationality or religion. This often leads to favoritism toward one’s in-group and distancing from out-groups, fostering stereotypes and discrimination. When we "Other" people—seeing them as outsiders—we lose compassion and focus on differences instead of shared humanity, reinforcing division. ...