It appears that the present-day form of African American English is not the inheritance of the period of slavery, but the creation of the second half of the 20th century.
“Let's have the music that will open the door to millions of people... the kind of music that will not make people think only of the song or even of the singer... not music that is confined to the merely personal.”
“The first function of a book review should be, I believe, to give some idea of the contents and character of the book.”