Human geography is the study of people and their relationships with the environment. Human Geography also has a global orientation, which emphasizes the interdependence which has become so characteristic of the modern world. The analysis of global interdependence follows the strategy outlined by the world system model, which defines different areas of the world as core, semi-peripheral, and peripheral. Patterns and trends in demography, agriculture, economic development, urbanization, and geopolitics are surveyed. Cultural landscapes including the global distribution of linguistic and religious diversity and the emergence of postmodern places are also reviewed.