This document provides an overview of world regions and geography. It discusses how geography influences cultures and economies. Regions are defined and classified in various ways, including formally by shared attributes and functionally by economic organization. Forces like globalization are increasing interconnectivity between regions. The document examines topics like population trends, economic development, social issues, the environment, and political structures at regional and global scales. Regional geography combines physical and human perspectives to holistically study territories and the relationships between communities worldwide.