A Topic of Moral Theology

Justifiable Homicide and Self-Defence

Killing an unjust aggressor in defence of life or goods.

Within this topic

Also asked about as…

defending myself · guns · home invasion · killing an attacker · self defense (ed.)

In the index as Self-defense · Aggressor · Unjust aggressor · Defense · Bloody punishment · Goods · Killing · Moderation of blameless defense · Modesty · Homicide · Force · Killing of self · Soldier · Violence · *Moderamen inculpatae tutelae* · *Scienti et volenti non fit iniuria* · *Volenti non fit iniuria* · Adultery · Aggregation theory of civil power · Azar · Becanus · Congruous satisfaction · Contract · Duhr, B. (S.J.)

In the manuals

A Manual of Moral Theology for English-Speaking Countries

Vol. I, Bk. VI, Pt. V, Chapter III. Justifiable Homicide, nn. 1, 2, 3 & 4 (4 passages — hover a number to read it)

Manual of Moral Theology (Manuale Theologiae Moralis)

Vol. I, Bk. II, Tr. II, Diss. I, Pt. V, Section III. On the Killing of an Unjust Aggressor, nn. 743, 744, 745 & 746 (4 passages — hover a number to read it)

Moral Theology: A Complete Course (McHugh & Callan)

Vol. II, Pt. II, Q. II, Art. 4. The Vices Opposed …, Homicide, nn. 1826, 1833, 1836, 1837, 1838, 1840, 1841, 1842 & 1843 (9 passages — hover a number to read it)

Institutions of Moral Theology (Institutiones Theologiae Moralis)

Vol. I, On the Fifth Precept of th…, III. On the Killing of an Unjust Aggressor, nn. 726, 727, 728, 729, 730, 731, 732, 733, 734 & 735 (10 passages — hover a number to read it)

Cases of Conscience, Proposed by Cardinal de Lugo, by Fr. Beniamino Elbel, by Fr. Ioannes Petrus Gury and by Other Authors, and Resolved (Casus conscientiae)

59. On Defense of Oneself, nn. 1, 2 & 3 (14 passages — hover a number to read it)

A Handbook of Moral Theology (Koch–Preuss)

Vol. V, Pt. I, Ch. IV, Section 2: The Right of Self-Defense, nn. ¶1–¶17 (17 passages)

Manuale Theologiae Moralis

Vol. II, Tr. XI, Sect. I, Q. III, Ch. III, Art. III, § 2, 2. On The Killing Of An Unjust Aggressor Or On Bloody Defense, nn. 120, 121, 122 & 123 (4 passages — hover a number to read it)

Summa Theologiae Moralis

Vol. II, Special Moral Theology: On…, Treatise: On the Cardinal …, Third Part: Concerning Com…, Section B: On Justice and …, Ch. I, Question Three: On the Killing of One's Neighbor, nn. 361 & 362 (18 passages — hover a number to read it)

Moral Philosophy: Ethics, Deontology and Natural Law

Pt. III, Ch. II, Section II. Of Killing done Indirectly in Self-defence, nn. 1, 2, 3, 4, 5, 6 & 7 (7 passages — hover a number to read it)

The Catechism of the Council of Trent (The Roman Catechism)

Pt. III, The Fifth Commandment, n. ¶12 — Killing In Self-Defence. If a man kill another in self-defence, having used every means consistent with his own safety to avoid the infliction of death, he evidently does not violate this Commandment.Read in context →

The Casuist: A Collection of Cases in Moral and Pastoral Theology

Vol. V, Case XII: Justified Injury to the Neighbor, or, a Guilty Man Exercising his Own Right, nn. ¶1, ¶2, ¶3, ¶4, ¶5, ¶6 & ¶7 (7 passages — hover a number to read it)

Institutiones Morales Alphonsianae

Vol. I, Pt. II, Sect. II, Tr. V, Ch. II, ARTICLE II: On the Killing of an Aggressor, nn. ¶733, ¶734, ¶735, ¶736 & ¶737 (5 passages — hover a number to read it)

Summa of Moral Theology (Summa Theologiae Moralis)

Vol. II, Part Second. On the Precep…, Book Fifth. On the Fifth P…, Question Fourth. On the Killing of an Unjust Aggressor, nn. 332, 333, 334 & 335 (4 passages — hover a number to read it)

Theologia Moralis Sancti Alphonsi: Reduced into a Compendium

Vol. I, TREATISE ON THE PRECEPTS O…, Ch. II, ARTICLE II: ON THE KILLING OF AN UNJUST AGGRESSOR, nn. ¶467, ¶468, ¶469, ¶470 & ¶471 (5 passages — hover a number to read it)

Compendium of Moral Theology

Vol. I, Tr. VI, On the Fifth Precept of th…, Ch. II, Article II. On the Killing of an Unjust Aggressor, nn. 268, 269, 269, Q. 2, 269, Q. 3, 269, Q. 4 & 269, Q. 5 (6 passages — hover a number to read it)

Palladium Theologicum, Tome V: On the Virtues

Tr. I, Disputation XXVI: On Homic…, Question VI: Whether it is lawful to kill a man within the limits of blameless defense, in defense of oneself or one's goods, nn. 1–24 (24 passages)

Tr. I, Disputation XXVI: On Homic…, Q. VI, Doubt I: Whether it is lawful to kill someone to preserve one's honor, rather than flee, nn. 1–20 (20 passages)

Tr. I, Disputation XXVI: On Homic…, Q. VI, Doubt II: Whether one who is attacked is bound in some case to kill the aggressor, nn. 1, 2, 3, 4 & 5 (5 passages — hover a number to read it)

Tr. I, Disputation XXVI: On Homic…, Q. VI, Doubt III: Whether it is lawful, in defense of one's own goods, to kill a thief, nn. 1–30 (30 passages)

Tr. I, Disputation XXVI: On Homic…, Q. VI, Doubt IV: Whether, in defense of chastity, it is lawful to kill the assailant, nn. 1, 2 & 3 (3 passages — hover a number to read it)

Compendium of Moral Theology of Fr. John Peter Gury, S.J., with the Notes of Antonio Ballerini, S.J.

Vol. I, Treatise On the Precepts o…, On the Fifth Precept of th…, Ch. II, Article II. On the Killing of an Unjust Aggressor, nn. 395, 396, 397, 398 & 399 (20 passages — hover a number to read it)

Synopsis of Moral and Pastoral Theology

Vol. III, Contracts, and the Obligat…, On the Virtue of Justice (…, Part I — Chapter II: On Injury, or the Violation of Right, nn. 325, 326, 327, 328, 329, 330, 331, 332 & 333 (9 passages — hover a number to read it)

Treated under the broader heading Life and Bodily Integrity (Fifth Commandment) — Vermeersch, Theologia Moralis · Merkelbach, Pastoral Questions · Coppens, Moral Philosophy · 1917 Code of Canon Law — these works do not divide the matter as finely as we do here, so their treatment stands one heading up (ed.)