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.
“We're all imperfect. And wouldn't it be great if the message sent out by the mainstream media is that we're fine being exactly who we are? Wouldn't that be great for everyone?”
“My high-school dream was to be in a band, pay my rent and eat - and I've been able to do that for 20 years. So I'm completely content.”