The United States utilizes a vast arsenal of foreign policy tools to induce, compel, and deter changes in other nations' foreign policies. As the quantity and quality of such activity increases, the U.S. "footprint" in such nations grows deeper and wider. The U.S. presence may range from a diplomatic mission to a massive invasion force. The United States may seek to use its presence to openly compel change in a regime's policies; it may employ its leverage to quietly induce policy modification; or it may use a combination of such strategies. And while the regime and citizens of one nation may welcome the United States and its largess, others may find such relationships a threat to the nation's honor and sovereignty. To the extent a deeper and broader foreign policy relationship (as measured by a U.S. military presence; U.S. foreign aid relationship; the discrete use of military force; and a substantial similarity in foreign policy preferences between the United States and another government) contributes to stability and friendship, U.S. interests are realized. But does a broad and deep military and foreign policy relationship with the United States always succeed in realizing these interests? Why would a cooperative relationship with the United States precipitate political and societal instability in the host nation? First, the U.S. relationship with the friendly or client regime may undermine the popular legitimacy and sovereignty of the government or interfere with local, political processes. Second, political ties with the United States often impact local economic conditions. Whether it is economic ties per se the United States is seeking to advance through opening markets, providing economic assistance, or promoting U.S. multinational corporation interests, or it is the economic spillover effects from a U.S. military presence, local market conditions are bound to be influenced by the actions of the world's largest economy within the local borders. Third, the local population may also be opposed to the broader U.S. foreign policy goals with which U.S. officials are seeking acquiescence or cooperation. Specific U.S. interests will also provoke antagonism as the populations of other states take exception to the ends or the means of U.S. foreign policy, and to their regime's degree of identification with such interests. On the other hand, U.S. foreign policy means and ends are intended and designed to promote positive relations and maintain stability in those nations with whom the United States seeks to foster amicable and cooperative relationships. A strong U.S. presence can promote multiple, positive conditions. First, to the extent that a U.S. presence promotes both internal and external security for a nation, it provides the protection and stability a state needs to develop economically and politically. U.S. friendship can deter interstate rivals from overtly aggressive behavior and can dissuade internal political rivals from sowing unrest. Second, to the extent a U.S. military presence or U.S. military aid alleviates the need for a government to expend resources on its own security, a regime is better able to utilize freed up resources on economic and social development that should further the nation's prosperity. Third, a U.S. military presence and military aid can stimulate the local economy and provide jobs for many nationals who are involved in businesses that contract with and supply the U.S. military, and can open avenues of opportunity for citizens to take part in educational, economic, and military interactions with the United States.