The focus of this book is on the teaching of morals within the Catholic Church. ... I focus on what appears to be true of slaveholding in every context: the right of the owner to determine the identity; education, and vocation of the slave and to possess the fruit of the slave's body. Acts exercising these kinds of domination were once accepted by the teaching Church as without sin. They are no longer.
-- John Noonan, A Church That Can and Cannot Change