The Territorial Imperative: A Personal Inquiry into the Animal Origins of Property and Nations by Ardrey, Robert (1966) Hardcover

"A territory is an area of space which an animal guards as its exclusive possession and which it will defend against all members of its kind. In this revolutionary book Robert Ardrey takes a concept familiar to every biologist, brings together for the first time a fair sampling of all scientific observations of this form of behavior, and demonstrates that man obeys the same laws as does many another animal species."--The dust-jacket front flap.