I am sending you some articles that give an overview of the play and explain the theme. In one of them, the author states it is
"A play about recovering the past and leaving it behind, Joe Turner's Come and Gone appropriately treats a transitional phase in African-American history: the Great Migration."
If you read some of these articles from our literary database, you will get a better understanding of the title of the play. You will need to login with your N# and PIN to read the articles.