During the 1830s alone, the migration of slaves to the lower South increased the slave population ... and national antislavery meetings. As the country expanded westward to Kansas and Nebraska ...

The last country to abolish slavery was the African ... the return on the slaveholder's investment has skyrocketed. In the antebellum South, slaves brought an average return of about 5 percent.

Settlers from the South wanted to move to the West ... of slavery As new states were created, the issue of slavery threatened to pull the country apart. In 1820 the Missouri Compromise was passed ...

Fewer potential modern slavery victims were referred to South Wales Police for investigation ... could be more than 120,000 ...