The Montevideo Convention on the Rights and Duties of States is a treaty. Today, it is part of customary international law. The treaty was signed at Montevideo, Uruguay, on December 26, 1933, at the Seventh International Conference of American States. At this conference, United States President Franklin D. Roosevelt and Secretary of State Cordell Hull declared the so-called Good Neighbor Policy which opposed U.S. armed intervention in inter-American affairs. Franklin D. Roosevelt tried to reverse the perception of "Yankee imperialism" with this treaty. The view of Yankee imperialism was brought about by policies instituted (largely) by his predecessor, President Herbert Hoover. The convention was signed by 19 states, three with reservations (Brazil, Peru and the United States).