Calhoun led South Carolina's attempt to nullify the Tariff of 1828, which became known as the [[Nullification Crisis]]. Calhoun was a plantation owner who helped develop the "positive good" theory of slavery. He also developed the South's expansive interpretation of states' rights. After Calhoun, Southerners believed that they carried the rights of their states into nationally owned territories, including a right to own slaves. | Calhoun led South Carolina's attempt to nullify the Tariff of 1828, which became known as the [[Nullification Crisis]]. Calhoun was a plantation owner who helped develop the "positive good" theory of slavery. He also developed the South's expansive interpretation of states' rights. After Calhoun, Southerners believed that they carried the rights of their states into nationally owned territories, including a right to own slaves. |