1926-2016 20thcentury 21stcentury africanamericans africanamericansinliterature afro-americansinliterature americanliterature civilrights civilrightsmovements civilrightsmovementsinliterature harper harper) history historyandcriticism lee literatureandhistory quelle racerelationsinliterature sources tokillamockingbird tokillamockingbird(lee unitedstates whiteauthors zeithintergrund