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.
“I love Johnny Cash, and I respect Johnny Cash. He's the biggest. He's like an Elvis in this business, but no, he's never been the rebel.”
“As long as some of us choose to rely on nuclear weapons, we continue to risk that these same weapons will become increasingly attractive to others.”