The integration of Latin America has a history going back to Spanish American and Brazilian independence, when there was discussion of creating a regional state or confederation of Latin American nations to protect the area's newly won autonomy. After several projects failed, the issue was not taken up again until the late nineteenth century, but now centered on the issue of international trade and with a sense of Pan-Americanism due to the United States of America taking a leading role in the project. The idea of granting these organizations a primarily political purpose did not become prominent again until the post-World War II period, which saw both the start of the Cold War and a climate of international cooperation that led to the creation of institutions such as the United Nations. It would not be until the mid-twentieth century that uniquely Latin American organizations were created.