The peculiar institution cited more often than anything else in defending states' rights was slavery. Africans had been present as slaves in the American colonies since the early 17th century; over the years the South began to rationalize it less as an evil and more of an economic necessity; so ingrained into the fabric of society had slavery become that Vice President John C. Calhoun was to say in 1838: | The peculiar institution cited more often than anything else in defending states' rights was slavery. Africans had been present as slaves in the American colonies since the early 17th century; over the years the South began to rationalize it less as an evil and more of an economic necessity; so ingrained into the fabric of society had slavery become that Vice President John C. Calhoun was to say in 1838: |