"The foundation of American economic prosperity rested on the labor of four to five million black slaves. In fact, the suffering inflicted on Native and Black Americans has not remained confined to those two races, but has become part of the collective American painbody. It is always the case that both victim and perpetrator suffer the consequences of any acts of violence, oppression, or brutality. For what you do to others, you do to yourself."
January 1, 1970
https://en.wikiquote.org/wiki/Slavery