The concept of Pan-Africanism has been around for a long time in spite of great historical events. Beginning as the nationalist thought of more or less detribalized Africans in the New World during the era of slavery, Pan-Africanism has survived the impact of such developments as the U.S. Civil War and Reconstruction, the post-Reconstruction era, the rise and fall of the Garvey movement, European colonialism in Africa, the Russian and other socialist revolutions of the twentieth century, and the black freedom movements in Africa, the United States, and the Caribbean since 1945.