hi! not discouraging other (scholarly) input, but FYI, this question has received several responses in the past:

• How do slurs form and change over time? Specifically, how did "nigger" go from neutral, to derogatory, to being acceptable by certain speakers?

• when was it first suggested black racial slurs like were offensive?

• Was "nigger" a insulting way to address blacks, our was it just what white people called blacks?

• When did the N-word go from being a commonly used word to refer to those of African-American descent, to being a word only Black culture could use?

• When did the term 'nigger' start being regarded as offensive?

• Antebellum Historians who have watched Django Unchained: can you discuss/clarify the use of the n-word in 1858 Mississippi?

• When did the word "nigger" start being commonly (publicly?) referred to as the "n-word"?

• At what point did 'Negro' become an unacceptable term for African-Americans?