The document discusses how urbanization led to changes in American culture and psychology in the late 19th century as people moved from rural to urban areas. It then explores how life in cities paradoxically led to isolation despite density, as analyzed by various writers, artists, and filmmakers over the 20th century. Finally, it prompts the reader to write an essay discussing this topic and whether modern technology promotes isolation by catering to individual tastes, or if Americans now prefer isolation.