| 1860-12-20 | South Carolina Secession Launches Confederate States Formation to Preserve Slavery as Explicit Constitutional Foundation
3 src James Buchanan | | confirmed |
| 1860-04-23 | Democratic Party Convention Split Over Slavery Platform Fractures Last National Institution Binding North and South
3 src Stephen A. Douglas · Democratic Party · Southern Democrats · Northern Democrats | | confirmed |
| 1842-03-01 | Prigg v Pennsylvania Supreme Court Ruling Protects Slave Catchers and Enables Kidnapping
3 src U.S. Supreme Court |
| confirmed |
| 1839-07-02 | Amistad Captives Revolt and Win Freedom in Supreme Court, Exposing Slavery's Illegality
3 src John Quincy Adams · U.S. Supreme Court | | confirmed |
| 1831-08-21 | Nat Turner Rebellion Triggers Brutal Repression and Tightening of Slave Codes Across the South
5 src | | confirmed |
| 1822-07-02 | Denmark Vesey Plans Massive Charleston Slave Rebellion, Exposing Institutional Terror
3 src | | confirmed |
| 1808-01-01 | Domestic Slave Trade Explodes After Import Ban, Creating Second Middle Passage
3 src | | confirmed |
| 1807-03-02 | Act Prohibiting Importation of Slaves Signed After Constitutional 20-Year Protection Expires
3 src Thomas Jefferson · U.S. Congress | | confirmed |
| 1800-12-03 | Thomas Jefferson Wins Presidency Through Three-Fifths Compromise Electoral Advantage
3 src Thomas Jefferson · John Adams | | confirmed |
| 1800-08-30 | Gabriel's Rebellion Plans Massive Slave Uprising in Virginia, Exposing System's Fragility
3 src James Monroe | | confirmed |
| 1794-03-22 | Slave Trade Act of 1794 Prohibits American Ships from International Slave Trade
3 src U.S. Congress · George Washington | | confirmed |
| 1793-03-14 | Cotton Gin Patent Transforms Slavery from Declining Institution to Booming Economic Engine
3 src Southern planters | | confirmed |
| 1793-02-12 | Fugitive Slave Act of 1793 Creates Federal Enforcement Apparatus for Slavery
6 src U.S. Congress · George Washington · Federal judges · Slaveholders | | confirmed |
| 1790-02-11 | Quaker Antislavery Petitions to First Congress Trigger Fierce Debate and Tabling
3 src Benjamin Franklin · James Madison | | confirmed |
| 1787-09-17 | Constitution Entrenches Slavery Through Three-Fifths Compromise and Multiple Protections
5 src Charles Pinckney · James Madison | | confirmed |
| 1787-09-06 | Electoral College Design Leverages Three-Fifths Compromise to Amplify Slave State Power
3 src James Madison · Southern state delegates | | confirmed |
| 1787-08-29 | Constitutional Convention Adopts Fugitive Slave Clause Requiring Northern Complicity
3 src Charles Pinckney · James Madison | | confirmed |
| 1787-08-25 | Constitutional Convention Guarantees 20-Year Protection for International Slave Trade
3 src Charles Pinckney · James Madison · Southern state delegates | | confirmed |
| 1787-08-08 | Gouverneur Morris Condemns Slavery as Curse of Heaven at Constitutional Convention
3 src James Madison · Southern state delegates | | confirmed |
| 1787-07-13 | Northwest Ordinance Prohibits Slavery While Mandating Fugitive Slave Returns
3 src Southern state delegates · Slaveholders | | confirmed |
| 1787-07-12 | Three-Fifths Compromise Gives Slaveholders Massive Extra Political Power
3 src Charles Pinckney · James Madison · Southern state delegates | | confirmed |
| 1705-10-01 | Virginia Slave Code of 1705 Consolidates Comprehensive Racial Caste System Into Law
3 src Virginia Colony · Slaveholders | | confirmed |
| 1676-09-19 | Bacon's Rebellion Unites Poor Whites and Blacks, Triggering Elite Shift Toward Racial Slavery
3 src | | confirmed |
| 1662-12-01 | Virginia Enacts Partus Sequitur Ventrem Making Slavery Hereditary Through Mothers
3 src Virginia Colony · Slaveholders | | confirmed |
| 1619-08-20 | First Enslaved Africans Arrive in Virginia, Beginning Atlantic Slave Trade in British North America
3 src Virginia Colony | | confirmed |