This text explores why people might exclude others to feel more included themselves within a group. It suggests that being exclusive can help individuals feel more like they belong to the group. The study shows that some group members, especially those on the edge, might have different views of who is part of their group than core members. Also, it reveals that where you stand in a group can affect how you see relationships with other groups around you. The research highlights how excluding others could be a way for some people to strengthen their sense of belonging to a group, even though it may lead to different perceptions between core and peripheral members.