The Wall Street Journal article, "How the Evolution of American Cities Defined a Nation," details the transformative journey of American cities, tracing their impact on the country's development. Over the past two centuries, the U.S. population has grown more than 40-fold, leading to extensive urban development that deeply influenced the regional economic, demographic, and environmental structures of North America. This unprecedented growth is reflected in the shift from a predominantly rural to an urban society, with the urban population's share increasing from 6% in 1800 to 81% in 2010.
The article highlights that early urban development initially diffused westward from Northeastern and coastal Southern states, with some isolated early growth nodes in the central and western U.S. predating their state demarcations. It references a study using the Historical Settlement Data Compilation for the United States (HISDAC-US), which leverages hundreds of millions of property records from 1810 to 2015 to offer fine-resolution analysis of urbanization patterns. This data demonstrates consistent long-term urban development, including settlement expansion, densification, and infilling processes.
The study also establishes a strong correlation between built-up properties and population growth, estimating that each additional built-up property at the county level is associated with approximately 2.2 to 2.25 additional people. This finding is significant given the lack of fine-resolution historical population data. The analysis shows that measures of built-up properties can explain around 93% of the variation in population across counties over time, with one unit increase in built-up properties correlating to an increase of about 2.6 to 2.7 people. This suggests that the evolution of urban landscapes is a robust proxy for population changes.
Historically, New York City has maintained its status as the largest U.S. city for over two centuries, with its estimated 2025 population reaching 8.6 million. However, the last few decades have seen a significant population shift towards Southern and Western cities, particularly in the Sun Belt. Cities like Los Angeles, Houston, Dallas, Fort Worth, San Antonio, and Austin have experienced substantial growth, with Los Angeles surpassing Chicago in population in 1984. This geographic redistribution of population has critical implications for national elections, the economy, and the evolving American culture, demonstrating how urban development continues to shape the nation's identity.
