"Iran's national security policy is the product of many, and sometimes competing, factors: the ideology of Iran's Islamic revolution; Iranian leadership's perception of threats to the regime and to the country; long-standing Iranian national interests; and the interaction of the Iranian regime's various factions and constituencies. Some experts assert that the goal of Iran's national security strategy is to overturn a power structure in the Middle East that Iran asserts favors the United States and its allies Israel, Saudi Arabia, and other Sunni Muslim Arab regimes. [...] Iran's national security policy focuses most intently on the Near East region, including on U.S. operations, allies, and activities in that region. It is that region where all the various components of Iran's foreign policy interact. Iran's policy also seems to be directed at influencing the policies and actions of big powers, such as those in Europe as well as Russia, that are active in the Near East-either as partners or antagonists of U.S. interests in that region."
CRS Report for Congress, R44017
Federation of American Scientists: http://www.fas.org/sgp/crs/index.html