The study of the use and understanding of space within and between culture groups of the world. Interpretation of cultural landscapes resulting from the interactions of humans with features and processes of the physical environment and with one another. Special attention is given to the concepts of location, place, distribution, circulation, and region. Focus on the concepts of culture region, cultural origin, cultural diffusion, cultural ecology, cultural interaction, and cultural landscape as applied to the analysis of specific culture traits, including those of popular culture. Additional topics include: demography, languages and religions, urbanization and landscape modification, political units and nationalism, and economic systems and development.