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Key Developments in Early U.S. History

May 8, 2025

Heimlich's History: AP U.S. History Unit 4 Review

Overview

  • Time Period: 1800 to 1848
  • Main Themes:
    • Expanding U.S. role in world affairs
    • Transformation of society and economy in the early republic
    • Growth of democratic impulses

Political Developments

Jefferson's Presidency

  • Election of 1800: Thomas Jefferson elected; debates between Democratic Republicans and Federalists continue.
  • Foreign Relations:
    • Barbary Pirates: Jefferson opposed paying bribes; ceased payments leading to naval conflict, eventually negotiated lower payments.
  • Federal Power:
    • Democratic Republicans: Advocated for strict constitutional interpretation.
    • Federalists: Supported loose interpretation of the Constitution.

Key Events

  • Louisiana Purchase (1803):

    • Diplomatic purchase from France for $15 million, doubling U.S. territory.
    • Led by Monroe; Jefferson's constitutional dilemma; justified for expansion.
    • Exploration by Lewis and Clark, Zebulun Pike.
  • Supreme Court Decisions:

    • Marbury v. Madison (1803): Established judicial review.
    • McCulloch v. Maryland (1819): Federal law prevails over state law.

War of 1812

  • Causes:
    • Neutrality violations by Britain and France; British impressment.
    • Westward expansion tensions; belief in British incitement of Indian resistance.
  • Consequences:
    • Rise of American nationalism.
    • Demise of the Federalist Party.
    • Highlighted weaknesses prompting the American System proposals.

American System

  • Henry Clay's Economic Plan:
    • Federally funded internal improvements.
    • Protective tariffs to support U.S. manufacturing.
    • Reestablishment of the National Bank.

Missouri Compromise (1820)

  • Balance of power between free and slave states maintained.
  • Introduced 36°30' line to limit slavery's expansion westward.

Foreign Policies

  • Adams-Onis Treaty (1819): U.S. acquired Florida from Spain.
  • Monroe Doctrine (1823): Declared Western Hemisphere off-limits to European interference.

Economic and Social Developments

Market Revolution

  • Linking of northern industries with southern and western agriculture.
  • Technological Advancements:
    • Cotton gin, spinning machine, interchangeable parts, steamboats.
  • Transportation:
    • Canals (Erie Canal), railroads expanded trade.
  • Growth of cities, immigrants from Germany and Ireland.

Society Changes

  • Labor Class:
    • Immigrants contributing to labor pool; harsh living conditions.
  • Middle Class:
    • Increased disposable income, leisure activities.
  • Women's Roles:
    • Cult of domesticity; separate spheres ideology.

Democratic Expansion

  • Panic of 1819: Led to demands for voting rights by affected working men.
  • Voting Rights: Expansion of franchise; decline of property qualifications.

Cultural and Reform Movements

Distinct American Culture

  • Transcendentalism: Emerson, Thoreau; emphasized nature, human perfectability.
  • Hudson River School: Romanticized American landscapes.
  • Second Great Awakening: Evangelical movement, societal moral reform.
    • Spread of temperance and other social reform movements.

Abolitionism and Women's Rights

  • Abolition Movement:
    • Led by figures like William Lloyd Garrison and the American Anti-Slavery Society.
  • Women's Rights Movement:
    • Seneca Falls Convention (1848); Declaration of Sentiments.

Southern Society

  • Expansion of plantations westward, increased slaveholding aristocracy.
  • Nat Turner's Rebellion (1831): Heightened fear of slave revolts.
  • Most southerners were non-slaveholding yeoman farmers.

Conclusion

  • This unit covers significant developments in U.S. political, social, and economic landscapes from 1800 to 1848. Understanding these key events and concepts is crucial for mastering the period's history.