What themes from to kill a mockingbird are echoed in bryan stevenson's speech? what themes are echoed in his work?

Bryan Stevenson's speech deeply echoed and reflected the themes of social injustice and inequality in Harpee Lee's novel - To Kill A Mockingbird. The prevelance of this injustice is explored with a clear hierarchy between the white families, all of whom are "ranked" above the towns black residents.