Slavery has always been condemned across the world; however in the end of the XX century, such canonical concept was rectified based on the extensive examination by American scholars of compilation of narratives of the former slaves collected in 1930s in the United States. At that time, 2,300 former slaves from 17 states were interviewed about their life in the era of slavery. Later, these interviews were placed in open access on the website of the Library of US Congress, reconstructing a contradictory picture of everyday life of African-Americans in the conditions of plantation economy: some reminiscences convey almost a nostalgic feeling of the past, while others criticizes it severely. The author in his attempt explain the historical accuracy of the results of mass interviewing of African-Americans, tries to make sense why 70 years later, the eyewitnesses of the same event have polar viewpoints. Forming the new comparative-historical approaches towards examination of collective consciousness under the influence of anthropologization of historical knowledge, the interview materials allow reconstructing the period, demonstrating the value system of the entire population group, unlike biography that structures the chain of events in chronological order. Analysis of the archive “Born in Slavery: Slave Narratives from the Federal Writers' Project, 1936-1938” has not been previously conducted within the Russian historiography, just briefly mentioned as one of the documentary aspects of the institution of slavery. The contained material is important for scientific comprehension of the bygone era of slavery, reflected in the collective memory of long-suffering African-American sub-ethnos. The problem of slavery in the United States, which synthesizes heritage of the past with practices of everyday life in various manifestations, seems optimal from the perspective of historiographical interest.