Human Geography of the United States: Settlement and Population Patterns

Global Geographic Context and Comparative Sizes

  • The United States ranks as one of the largest countries globally by total surface area.

  • Primary Global Area Leaders:

    • Russia

    • Canada

    • China

    • United States

    • Brazil

  • Geopolitical and Geographic Impact: The vast physical size of the U.S. is the primary driver for its extreme regional diversity in both settlement density and population demographics.

Global and Domestic Population Overview

  • International Context: The U.S. is among the most populous nations. The global hierarchy includes:

    • India

    • China

    • United States

    • Indonesia

    • Pakistan

  • Additional High-Population Nations: Nigeria, Brazil, Bangladesh, Russia, and Mexico.

  • Domestic Population Rankings (U.S. States):

    • Most Populous: California, Texas, Florida, New York, and Pennsylvania.

    • Least Populous: South Dakota, North Dakota, Alaska, Vermont, and Wyoming.

Historical Population Growth and Distribution Trends

  • Timeline of Growth:

    • 1900: Approximately 76,000,000 people.

    • 1950: Approximately 152,000,000 people.

    • 2000: Approximately 275,000,000 people.

    • 2020: Exceeds 330,000,000 people.

  • Internal Migration: There has been a definitive geographic shift in the center of population. Originally concentrated in the Northeast and Midwest, the distribution has significantly moved toward the South and West.

Pre-Columbian Inhabitants and Indigenous Societies

  • Initial Settlement: The first inhabitants are believed to have crossed a land bridge (Beringia) connecting Asia and Alaska during the Ice Age.

  • Pre-Contact Demographics: Estimates suggest a population of 5,000,000 to 10,000,000 Indigenous people prior to European arrival.

  • Population Decline: Following European contact, Indigenous populations suffered a dramatic collapse due to the introduction of Old World diseases and the effects of colonization.

  • Cultural Diversity: Numerous distinct tribes existed, including the Cherokee, Navajo, Choctaw, Chippewa, and Sioux.

  • Modern Presence: High concentrations of Indigenous populations remain in states such as Alaska, Oklahoma, New Mexico, and South Dakota.

  • Specific Societal Examples:

    • Pueblo Peoples: Located in the Southwest; known for irrigation-based agriculture, extensive trade networks, and permanent multi-story housing.

    • Paiute: Semi-nomadic groups characterized by their adaptation to arid desert environments.

    • Cherokee: Known for agricultural communities and permanent settlements in the East before being displaced by U.S. westward expansion.

Imperialism, Colonialism, and the Columbian Exchange

  • Timeline: European exploration intensified during the 15^{th} and 16^{th} centuries.

  • Key Definitions:

    • Imperialism: The policy of large powers occupying and controlling distant, foreign territories.

    • Colonialism: The specific practice of political and economic domination over a region by an external society.

  • The Columbian Exchange: The post-1492 biological and cultural crossing between Europe, Africa, and the Americas.

    • Items exchanged: Crops, livestock, human populations (voluntary and forced), and pathogens.

    • Impact: Fundamentally altered global agriculture, demographics, and cultural structures.

Early Demographic Foundations and Slavery

  • 1650 (Early Colonial Era): Population was strictly focused within the original 13 colonies along the Atlantic shoreline.

  • 1790 (The First U.S. Census):

    • Settlement remained concentrated in eastern states.

    • Ethnic makeup: Predominantly English, African-American, Scottish/Irish, and German.

  • Slavery and Forced Migration:

    • Enslaved Africans represented a massive forced migration that underpinned the early American economy.

    • Volume: Approximately 12.5 million Africans were transported across the Atlantic.

Immigration Waves and Westward Expansion

  • 19^{th} Century Migration Cycles:

    • First Major Wave (1815-1860s): Primarily from Northwestern Europe.

    • Second Major Wave (1860s-1890s).

    • Mechanics: Driven by "push-pull factors," where negative conditions at home pushed migrants out and positive opportunities in the U.S. pulled them in.

  • Territorial Expansion Milestones:

    • Louisiana Purchase (1803)

    • Florida Purchase (1819)

    • Annexation of Texas (1845)

    • Oregon Compromise (1846)

    • Mexican Cession (1848)

  • Manifest Destiny: A 19^{th}-century ideological belief that the U.S. was divinely destined to expand across the continent. This provided the political and moral justification for expansion, often resulting in the displacement of Indigenous groups.

Later Immigration and Modern Demographics

  • The Great Wave (1890s to WWI): The largest immigration surge in U.S. history, characterized by entry through ports like New York City.

    • Melting Pot: The concept of diverse immigrant groups blending into a unified culture.

    • Chain Migration: A process where established migrants assist relatives in moving to the same destination.

  • Mid-20^{th} Century to Present: Immigration plummeted during the Great Depression and WWII but spiked after the 1960s.

  • Contemporary Statistics (2020 Census):

    • Non-Hispanic White: 57.8\%

    • Hispanic or Latino: 18.7\%

    • African-American or Black: 12.1\%

    • Asian: 5.9\%

    • Native American (incl. Hawaiian/Alaskan): 0.9\%

    • Other: 4.6\%

  • Global Standing: The U.S. hosts the largest total number of immigrants (including lawful, unauthorized, and refugees) of any country.

  • Primary Source Countries: Mexico (largest), followed by China, India, the Philippines, and El Salvador.