He was a French historian and political scientist who championed "uniquely American" values such as egalitarianism.
Answer:Nullification crisis, in U.S. history, confrontation between the state of South Carolina ... The doctrine of nullification had been advocated by Thomas Jefferson and James ... John C. Calhoun furthered the nullification doctrine in his South Carolina ... of the legislature) to take an oath of support for the ordinance, and threatened contrast
Explanation:
Answer: helped spark revolutions in people who wanted democracy.
Explanation: edge 2021