What did the U.S. foreign policy of "isolationism" entail during the 19th century?

The U.S. foreign policy of isolationism during the 19th century primarily revolved around a reluctance to involve the United States in foreign conflicts and colonial pursuits. This approach was characterized by an emphasis on domestic affairs and a belief that the nation should avoid entanglements in European and global affairs.

The principles of isolationism were reflected in various doctrines and practices, such as the Monroe Doctrine of 1823, which aimed to deter European intervention in the Americas and established a clear stance against involvement in European conflicts. This period was marked by a general avoidance of alliances or military engagements that could drag the U.S. into wars abroad. American leaders sought to prioritize national interests and internal development rather than imperial expansion or active participation in global affairs.

Understanding this context enriches the grasp of U.S. policies during the 19th century, offering insights into how these themes of isolationism shaped subsequent international relations and policies as the nation transitioned into the 20th century.