Prophets, Politics and Power is an awesome read by Judith Morishima-Nelson.. ..its slightly mammoth though, but don't give up!
This is a wee excerpt-
Rachel McGuire, writing from Colgate Rochester, writes about the Social Gospel that
"the social gospel is the gospel. It was the answer to the oppression of the Roman Empire in Jesus' and Paul's time…It was the driving force behind the ending of slavery and mission of the black church as a…social…institution. It was the powerful force underneath 20th century movements to become free of political and racial oppression, particularly the Civil Rights movement. And it is the only way out of the global oppression…and unprecedented economic imperialism (…mass human suffering and environmental destruction) being wrought by the United States today."