cotton gin. At the same time, the Industrial Revolution, which made textile manufacturing a large-scale operation, vastly increased the demand for raw cotton. Additionally, the opening of new lands in the West after 1812 greatly extended the area available for cotton cultivation. Cotton culture moved rapidly from the Tidewater states on the East coast through much of the lower South to the delta region of the Mississippi and eventually to Texas. Sugarcane, another labor-intensive crop, also contributed to slavery's extension in the South. The rich, hot lands of southeastern Louisiana proved ideal for growing sugarcane profitably. By 1830 the state was supplying the nation with about half its sugar supply. Finally, tobacco growers moved westward, taking slavery with them. As the free society of the North and the slave society of the South spread westward, it seemed politically expedient to maintain a rough equality among the new states carved out of western territories. In 1818, when Illinois was admitted to the Union, 10 states permitted slavery and 11 states prohibited it; but balance was restored after Alabama was admitted as a slave state. Population was growing faster in the North, which permitted Northern states to have a clear majority in the House of Representatives. However, equality between the North and the South was maintained in the Senate. In 1819 Missouri, which had 10,000 slaves, applied to enter the Union. Northerners rallied to oppose Missouri's entry except as a free state, and a storm of protest swept the country. For a time Congress was deadlocked, but Henry Clay arranged the so-called Missouri Compromise: Missouri was admitted as a slave state at the same time Maine came in as a free state. In addition, Congress banned slavery from the territory acquired by the Louisiana Purchase north of Missouri's southern boundary. At the time, this provision appeared to be a victory for the Southern states because it was thoug...
