Slavery's expansion in the early United States was driven by economic, political, and technological factors. The invention of the cotton gin, the Louisiana Purchase, and growing demand for cash crops fueled the spread of slavery across the South and into new territories. This expansion had profound consequences for African American communities, tearing apart families and intensifying oppression. It also sparked resistance and abolitionist movements, setting the stage for deepening sectional conflicts that would ultimately lead to the Civil War.