The subject of a commerical treaty quickly emerged after the United States recognition of the independence of Mexico in 1822. To negotiate this treaty Joel Roberts Poinsett was appointed Envoy Extraordinary and Minister Plenipotentiary to Mexico. Since Mexico had modeled its constitution after that of the United States, Henry Clay, Secretary of State, instructed Poinsett to make himself available to explain the practical operation and advantages of our system to Mexico. Inherent in our constitution and system was freedom of religion, establishment of which in our relations with Mexico constituted an objective of Poinsett's mission. Clay incorporated into Poinsett's instructions those which his predecessor, John Quincy Adams, on May 27, 1823, addressed to Richard Clough Anderson, Jr., Minister Plenipotentiary to Colombia. Adams had emphasized the importance of inserting the principle of religious liberty in the commercial treaty with Colombia. Liberty of conscience and of religious freedom were among the usual objects of a commercial treaty. He expostulated that “civil, political, commercial, and religious liberty, are but various modifications of one great principle founded in the inalienable rights of human nature, and before the universal application of which the colonial domination of Europe over the American hemisphere, has fallen, and is crumbling into dust.”
