Meaning: This quote by James Monroe, the fifth President of the United States, addresses the significant impact of population growth on the nation. Monroe served as president from 1817 to 1825, a period marked by rapid population expansion and territorial acquisitions for the United States. His quote reflects the awareness of the transformative effect that population growth would have on various regions of the country, particularly those that were being considered for future development and expansion.

Population growth has been a central factor in shaping the history and development of the United States. At the time of Monroe's presidency, the country was experiencing a substantial increase in its population, driven by factors such as immigration, natural population growth, and territorial expansion. This demographic shift had profound implications for the nation's economy, society, and politics, and Monroe's quote underscores the significance of this trend.

Monroe's reference to the "great increase of our population throughout the Union" highlights the widespread nature of this demographic change. The United States was witnessing a surge in its population, with people settling in various regions across the country. This growth brought about a range of opportunities and challenges, as new communities emerged, urban centers expanded, and the demand for resources and infrastructure increased.

Furthermore, Monroe's assertion that the impact of population growth would be "sensibly felt" underscores the palpable and tangible effects that this demographic shift would have on different parts of the country. From economic development to social dynamics, the growing population was poised to shape the fabric of American society in diverse and profound ways.

The phrase "in those in contemplation" suggests that Monroe was specifically considering the implications of population growth for areas that were being deliberated for future development and expansion. This could encompass territories acquired through treaties, as well as lands targeted for westward expansion and settlement. As the United States looked to expand its borders and influence, the burgeoning population played a crucial role in driving the nation's territorial and economic ambitions.

Monroe's quote also speaks to the broader theme of manifest destiny, the belief prevalent during the 19th century that the United States was destined to expand across the North American continent. The rapid population growth was intricately linked to this expansionist mindset, as more people migrated westward in search of land, opportunity, and a better life. This westward movement, fueled by a growing population, reshaped the geographic and demographic landscape of the nation.

In conclusion, James Monroe's quote encapsulates the profound impact of population growth on the United States during the early 19th century. His recognition of the far-reaching consequences of this demographic shift underscores the pivotal role that population dynamics played in shaping the nation's trajectory. From driving westward expansion to influencing economic and social change, the burgeoning population of the United States left an indelible mark on the country's history and development.