"Territorial functioning" refers to an interlocked system of sentiments, cognitions, and behaviors that are highly place-specific, and socially and culturally determined and maintaining. In this book, Ralph Taylor explores the consequences of human territorial functioning for individuals, small groups, and the ecological systems in which they operate. His exploration is illuminated by his evolutionary perspective, and grounded in empirical studies by social scientists and in theoretical work on the evolution of social and spatial behaviors. He systematically reviews the related research and theory, and indicates the importance of territorial functioning to current social and environmental problems. Contrary to popular wisdom, he argues that territorial functioning is relevant only to limited locations, such as street blocks, and not to neighborhoods or nation states, and that it reduces conflicts and helps maintain settings and groups. His theoretically focused examination of all that has been discovered about human territorial functioning will interest a wide variety of environmental psychologists and designers, urban sociologists, social psychologists, planners, and ethologists, and their students.