Territoriality is a pattern of attitudes and behavior held by a person or group that is based on perceived, attempted, or actual control of a physical space, object, or idea, which may involve habitual occupation, defense, personalization, and marking of the territory. Marking means placing an object or substance in a space to indicate one's territorial intentions. Cafeteria diners leave coats or books on a chair or table. Prospectors stake claims. Personalization means marking in a manner that indicates one's identity. Many employees decorate their workspaces with pictures and mementoes. Some car owners purchase vanity license plates. Territoriality usually is associated with the possession of some physical space, but it can also involve such processes as dominance, control, conflict, security, claim staking, vigilance, and identity. ...