11. 17th Feb - Civil War as Constitutional Crisis

1. Big Question

Could the Constitution withstand 19th-century change?

By the 1840s–1850s, the Constitution began to “buckle” under economic, territorial, and political pressures  .

2. Structural Changes in Early 19th Century America

Shift in Political Culture

  • From Jefferson/Hamilton era → Jacksonian democracy

  • Constitution in theory vs. Constitution in practice

  • Rise of market economy, banking, technology, mobility, demographic growth

Changing Supreme Court

  • John Marshall Court: Strong federal power; protection of private property

  • Roger Taney Court: Jacksonian shift; “release of energy” (more democratic, less elite control)

3. Slavery = The Central “Crack”

Key constitutional ambiguities  :

  • Was slavery about people or property?

  • Did the Constitution protect slavery or liberty?

  • Could slavery expand westward?

4. Missouri Compromise (1820)

Political crisis over Missouri statehood  :

  • Threatened balance of free vs. slave states

  • Raised question of slavery in western territories

  • Maine admitted as free state to maintain balance

  • First major sign the Union was fragile

5. Western Expansion = Political Explosion

Mexico & Indigenous Power

  • Mexican independence (1821)

  • Much northern Mexico actually controlled by Comanche

Texas (1836–1845)

  • Mexico invited U.S. planters

  • Mexico banned slavery (1829)

  • Texan slaveholders declared independence

Expansion became inseparable from slavery.

6. Growth of the Domestic Slave Trade

  • Atlantic trade ended in 1808

  • ~1.2 million enslaved people forcibly moved within U.S. by 1860

  • Slavery became more visible → fueled abolitionism

7. Early Abolitionism & Colonization

American Colonization Society

  • End slavery but remove freed people to Africa

  • Founded Liberia

  • Reflected belief America was a white nation

Shared logic with Indian Removal.

8. Radical Abolitionism

William Lloyd Garrison

  • Demanded immediate abolition

  • Called Constitution a:

    • “Covenant with death”

    • “Agreement with hell”

  • Rejected electoral politics

  • Burned Constitution publicly

View: Constitution = pro-slavery document.

9. Political Anti-Slavery (Liberty Party)

  • Formed ~1840

  • First formal anti-slavery party

  • Believed slavery could be ended through federal action

  • Rejected Garrison’s anti-Constitution stance

10. Mexican-American War (1846–48)

  • James K. Polk elected 1844 as expansionist

  • Treaty of Guadalupe Hidalgo (1848)

  • Massive new western territory

Result: TOTAL PANIC over slavery expansion

Questions:

  • Would slavery spread to Southwest?

  • Mining? Railroads? Corporations?

11. Gold Rush & California (1848–49)

  • Rapid migration → highly diverse society

  • Who counts as a citizen?

  • California applied as a free state

  • Missouri Crisis all over again

12. Free Soil Party (1848)

  • Opposed expansion of slavery

Free Soil Constitutional Argument

  • Slavery = state institution, not national

  • Federal government cannot abolish it in existing states

  • But Congress can prevent its expansion

  • “Free soil, free speech, free labor, free men”

13. The Core Constitutional Crisis (1840s–1850s)

Was the Constitution:

  1. Pro-slavery and irredeemable? (Garrison)

  2. Neutral, but barred expansion of slavery? (Free Soilers)

  3. Pro-slavery, but fixable through legislation? (Liberty Party)

This debate set the stage for:

  • California statehood crisis

  • Sectional polarization

  • Dred Scott decision

🔑 Core Themes to Remember

  • Slavery was the central constitutional fault line.

  • Westward expansion constantly reopened the slavery question.

  • The Constitution’s ambiguity about slavery became unsustainable.

  • Political parties formed around competing constitutional interpretations.

  • By the 1850s, compromise was collapsing.