Chauncy Harris was an American geographer known for his contributions to urban geography and spatial analysis. He was born on February 24, 1921, and passed away on January 1, 2003. Harris is best known for developing the Harris-Todaro model, which explains rural-to-urban migration in developing countries. In addition to his work on migration, Harris co-authored the influential book Urbanization in the United States and contributed to the understanding of city structures. His research emphasized the importance of social and economic factors in shaping urban environments, making significant impacts on the field of geography.