Christ, who never condemned slavery, left it to His followers to discover gradually that slavery as an institution was inconsistent with following Him. So real Catholics believe what the Church teaches and endeavour to live that teaching, but should seek to know what may be further clarified by research and discussion, and what may be refuted. So what denotes real slavery and how that has or has not been imposed, versus serfdom and servitude (penal, indentured and of those captured in a just war) can be clarified.
In, *Development or Reversal?, *the late Avery Cardinal Dulles, S.J., in
First Things, October 2005 – debunks the often preconceived conclusions over slavery and the Church.
“Slavery was practiced by almost every known society until modern times. Throughout the biblical era, Noonan shows, slavery was taken as a given, although the Israelites practiced rather mild forms of slavery and did not permanently enslave their compatriots. Jesus, though he repeatedly denounced sin as a kind of moral slavery, said not a word against slavery as a social institution. Nor did the writers of the New Testament. Peter and Paul exhort slaves to be obedient to their masters. Paul urges Philemon to treat his converted slave Onesimus as a brother in Christ. While discreetly suggesting that he manumit Onesimus, he does not say that Philemon is morally obliged to free Onesimus and any other slaves he may have had.
“Serfdom did not involve the humiliation and brutality people today ordinarily associate with slavery. Moral theologians recognized that slaves, unlike mere chattels, had certain rights even against their masters, who no longer had over them the power of life and death, as had been the case in pagan antiquity.
“For St. Thomas, slaves (servi) had the right to food, sleep, marriage, and the rearing of their children. Provision had also to be made for them to fulfil their religious duties, and they were to be treated with benevolence.
“John Paul II in 1992: Speaking at the infamous “House of Slaves” on the Island of Gorée in Senegal, from which innumerable slaves had been exported, he declared: ‘It is fitting to confess in all truth and humility this sin of man against man, this sin of man against God.’ The pope is here speaking of the slave trade, which had repeatedly been condemned. Far from changing the doctrine, John Paul is explicitly reaffirming the position of Pope Pius II, whom he quotes as having declared in 1492 that the slave trade was an enormous crime,
magnum scelus.
Avery Cardinal Dulles, S.J., holds the Laurence J. McGinley Chair in Religion and Society at Fordham University.
firstthings.com/article/2005/10/development-or-reversal