It was illegal for black people and white people to play checkers together in Birmingham. And there were even black and white Bibles to swear to tell the truth on in many parts of the South.

Miles Davis, his parents migrated from Arkansas to Illinois, where he had the luxury of being able to practice for hours upon hours. He never would have been able to do that in the cotton country of Arkansas.

Many immigrants do not talk about what they endured back home. They were fleeing that world, and when they left they didn't want to talk about it because there had been pain and heartbreak under the caste system of the South. They didn't want to burden their children with what they had endured.

At the beginning of the 20th century, before the migration began, 90 percent of all African-Americans were living in the South. By the end of the Great Migration, nearly half of them were living outside the South in the great cities of the North and West. So when this migration began, you had a really small number of people who were living in the North and they were surviving as porters or domestics or preachers - some had risen to levels of professional jobs - but they were, in some ways, protected because they were so small.

You must leave this world a better place than it would have been if you had not existed.

There are certain things that we take for granted that simply would not have existed without the great migration. Motown, for example, would not have existed - it simply would not, because Berry Gordy, the founder of it, his parents had migrated from Georgia to Detroit where he founded Motown, and where did he get his talent?

What I love about the stories of the Great Migration is that this is not ancient history; this is living history. Most people of color can find someone in their own family who had experienced a migration of some kind, knowing the sense of dislocation, longing and fortitude.