A Topic of Moral Theology

Killing an unjust aggressor in self-defence

Defence of life with the violence necessary; cum moderamine inculpatae tutelae.

Also asked about as…

defending yourself (ed.)

In the index as Aggressor (Aggressor) · Killing · Unjust aggressor · Moderation of blameless defense (Moderamen inculpatae tutelae) · Defense · Bloody punishment · Homicide · To kill · Invader of goods · Killing an unjust aggressor · Force · Killing of self · Moderation Of Blameless Self-Defense · To Strike · Violence · Woman (Mulier) · *Moderamen inculpatae tutelae* · *Scienti et volenti non fit iniuria* · *Volenti non fit iniuria* · A drunken man is held to positive law · Adultery · Aggressor Against Chastity · Azar · Becanus

In the manuals

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)

A Manual of Moral Theology for English-Speaking Countries

Vol. I, Bk. VI, Pt. V, Chapter III. Justifiable Homicide, n. 1 — IN defence of my own life from unjust attack I may use whatever violence is necessary and even go to the length of killing the aggressor, if I cannot otherwise save my life. This right of self-defence all laws, human and… Read in context →

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 (2 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)

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)

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)

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)

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)

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)

Treated under the broader heading Justifiable Homicide and Self-Defence — Wouters, Manual of Moral Theology · McHugh–Callan, Moral Theology · Bucceroni, Cases of Conscience · Rickaby, Moral Philosophy · The Roman Catechism · The Casuist — these works do not divide the matter as finely as we do here, so their treatment stands one heading up (ed.)