The market revolution promoted both slavery and freedom. As the 1800s progressed, American society changed from a subsistence society to one that produced commercial products. This development was furthered by the use of the steam engine. New machines were used to make and to transport products.
Many Americans gained more freedom because they were more easily able to move to new areas to start new businesses or to start new farms. They had many opportunities to get land cheaply in order to start these new business ventures or to begin farming. The country grew as Americans moved westward. The economy also grew as a result of these changes.
In the South, the use of machines, especially the cotton gin, promoted the use of slavery. With the use of the cotton gin, more cotton could be used to make clothes. As cotton farming expanded in the South, so did the use of slaves. As northern industries used new machines to make cotton clothes quickly, the demand for cotton rose. Additionally, other countries increased their demand for cotton grown in the southern part of the United States. Thus, more slaves were needed and were used in the South.