The best known statement of the theory of nullification during this period was said by John C. Calhoun
Once there was a story all bout' how cronos life got twisted upside down but id like to wait a minute and sit right here a tell you how the lightning thief came to be
An indentured servant was someone who would pay for his journey to the US or for his debt by serving the person who helped him and after a while the debt would be over and the person would be free. The person would have all rights like regular people. Slaves had no rights at all and were not even observed as people and their slavery would never end unless the owner specifically freed them. Slavery was not contractual unlike indentured serviture.
If we didn't westward expand as early as we did we wouldn't have all of the geographic patterns we have today in the U.S.