Henry Clay proposed the American System, which aimed to promote economic development across all sections of the United States. The American System included protective tariffs to encourage domestic manufacturing, a national bank to stabilize the currency, and federal funding for internal improvements like roads, canals, and railroads to facilitate transportation and commerce. While the American System helped modernize the nation's infrastructure and economy, it also exacerbated sectional tensions between the industrial North and agricultural South by benefiting some regions more than others.