Interventionism is a policy of intervening in the domestic affairs of other nations, often for strategic, political, or humanitarian reasons. This intervention can take various forms, including military force, economic sanctions, or diplomatic pressure.

The U.S. has historically practiced interventionism, from interventions in Latin America during the Cold War to more recent actions in Iraq and Libya. Supporters argue that interventionism can prevent atrocities or promote stability, while critics claim it can lead to prolonged conflicts, undermine sovereignty, and provoke anti-Western sentiment.