The present pope has expressed his personal opinion in Evangelium
Vitae and in the Catechismus Catholicae Ecclesiae (the Novus Ordo
catechism) that “modern penology” has developed to the point
that the death penalty should virtually never be used. Of course, the
pope has a right to his personal opinion, but it is in no way a general
teaching of faith or morals of the Church. It would be somewhat akin to
the pope expressing a personal opinion on astronomy.
The teaching of the Church from the earliest centuries, as
represented, e.g., in the writings of St. Augustine, St. Thomas Aquinas
(Summa Theologica, IIa IIae, Q. 64, A. 2), and St. Alphonsus Liguori (all
Doctors of the Church), as well as in the Encyclical Casti Conubii of Pope
Pius XI, is that society has the authority to inflict punishments upon its
members, and even to deprive a criminal of his life, for the necessity of the
common good: (1) primarily, to vindicate the moral order and expiate the
crime, (2) secondarily, to defend itself, (3) to deter other would-be
offenders, and (4) to reform the criminal or deter future crime.
Pope Pius XII, in an address (“Ce Premier Congress”) on the moral
limits of medical research and treatment to the First International Congress
of Histopathology of the Nervous System, held in Rome on September 13, 1952,
contrasted the right to life with the benefit of life in the case of a justly
condemned criminal: "Even when there is question of a person condemned to
death, the state does not take away the right of the individual to life.
It is then reserved to the public authority to deprive the condemned person
of the benefit of life in expiation for his guilt, after he himself, by his
crime, has already deprived himself of his right to life. (Acta Apostolicae
Sedis XLIV (1952), p. 787)
The dogmatic Council of Trent decreed: “[well founded is] the right
and duty of legitimate public authority to punish malefactors by means of
penalties commensurate with the gravity of the crime, not excluding, in cases
of extreme gravity, the death penalty.”
It should be noted that to vindicate the moral order means not the
taking of vengeance upon the criminal, but imposing upon the criminal
some act or loss or suffering as a form of compensation to right the
balance of justice. Of such “vindictive” punishment, Pope Pius XII
stated: “It would be incorrect to reject completely, and as a matter of
principle the function of vindictive punishment. While man is on earth,
such punishment both can and should help toward his eternal salvation,
provided he himself raises no obstacles to its salutary efficacy”
(Discourse of December 5, 1954, Acta Apostolicae Sedis, XLVI, p. 67).
Given these purposes, an execution may take place if the following
conditions are met: (a) the guilt of the prisoner is certain; (b) the
crime is of major gravity; (c) the penalty is to be inflicted, after due
process, by state authority, not by private individuals or by lynching,
and (d) the prisoner is given the opportunity to make his peace with
God.
Given these criteria, Catholics may differ in their prudential
judgments as to whether a particular society needs to employ capital
punishment for its own protection. To say that it is wrong per se or
never justified is contrary to the traditional teaching of the Church.
A Catholicm may not add his prudential judgments to the list of Church
doctrines and enjoin them as obligatory. However, the state may always
choose to commute the deserved penalty.