黑人在美国社会一直受到不公正的待遇。美国内战前黑人没有任何自由,被迫悲惨地沦为奴隶,受到非人的待遇。美国内战期间,林肯发表了《解放黑人奴隶宣言》,使黑人获得了人身自由,但是社会上始终存在着严重的种族歧视心理,无论是生活、工作还是受教育,黑人都没有与白人一样的机会和待遇,政治上更是毫无地位可言。在这一情况下,社会上出现了普遍的 Blacks have been unfairly treated in American society. The blacks did not have any freedom before the American Civil War and were forced to become miserably slaves and treated inhumanly. During the American Civil War, Lincoln published the Declaration on the Emancipation of Black Slaves, which gave the blacks personal freedom. However, there was always a serious racism in society. Blacks did not have the same opportunities as whites, whether they were living, working or educated And treatment, there is no political status at all. In this case, there has been widespread in society