Two main points of Clay's system were the protection of American manufacturers from foreign competition, compromising the congress into forcing internal trade and protection from imports. The second point was to reach a diversified economy, believing the U.S. should be both industrial and agricultural, creating the need to enforce programs with such intentions.
In the late 1820s tensions about the government interfering in the economy and development in such extent that South Carolina threatened to withdraw from the Union because of a tariff, birthing the Nullification Crisis. Eventually Clay's concept of taxes and internal improvements became standard policy in the late 1800s.
