When Presbyterian missionaries entered Iran, they did so with the intention of introducing modern, Western civilization to the country. Regarding themselves as “servants of God sent to render service to man,” they favored a future for Iran in education, society, and politics much like what they foresaw for America: a nation that would be Christian, scientific, vigorous, cooperative, and democratic. In the inter-war years, it seems, they sought to achieve this vision by supporting Reza Shah's military dictatorship.
This seeming pro-Pahlavism can be explained, in part, by Jesus‘ exhortation to “render … unto Caesar the things which are Caesar's and unto God the things which are God's” (Matt. 22:21). Serving but one God—that of Abraham, Isaac, Moses, and Jesus—the missionaries had to contend with two “caesars.” While they were patriotic Americans, loyal to the United States, they lived and worked in Iran, and therefore served at the pleasure of the Iranian government.