Nat Turner led a slave rebellion in Southampton County, Virginia in 1831 that resulted in the deaths of about 60 white people. Turner and other rebel slaves were executed in response. As a consequence of the rebellion, southern states passed laws restricting slaves' ability to assemble or learn to read and write in order to prevent exposure to abolitionist ideas. Between 1831 and the Civil War, there were no other major uprisings by slaves. The cotton gin made short-staple cotton profitable, leading to the expansion of cotton plantations in the deep south and a strengthening of the slave-based plantation system. By 1860, half the southern population were slaves, with the majority working on large cotton, rice or sugar plantations.