|The history of the United States is scarred by racial tension. While the 13th Amendment to the Constitution outlawed slavery and indentured servitude throughout the United States in 1865, it did not end racism.
By the 1920s the Ku Klux Klan (KKK), an avowed white supremacist group, had four million members.
By 1954 Ellis Island officially closed after more than 12 million immigrants had passed through. Ethnic bias intensified the struggles of many in these immigrant populations.