Intervention in American Diplomatic History Wang Lixin(90) The article describes and analyzes the evolution of American attitude toward its intervention in international politics and other countries’ internal affairs through the perspectives of political culture and national security. According to the author, the US had opposed and avoided interfering in international affairs until the end of the 19th century. The SpanishAmerican War began the age of limited and selective interventions in American foreign relations, which mainly focused on the affairs of Latin American countries. After the end of World War Two, on the basis of anticommunism as a national security doctrine the US intervention in international affairs became globalized. American intervention in the international affairs takes roots both in its search for power and interest and its unique political culture based on the concept of liberty. In the postCold War era, national security requirement, the ideal of exporting democracy and the expectation of low cost in intervention constitute the determinants of whether a policy of intervention should be adopted or not.