20 St. Augustine, Contra Faustum Manichæum, xxii. 75 (Migne, op. cit. xlii. 448).
21 St. Augustine, De civitate Dei, xix. 11.
By the writings of St. Augustine the theoretical attitude of the Church towards war was definitely settled, and later theologians only reproduced or further elaborated his views. Yet it was not with a perfectly safe conscience that Christianity thus sanctioned the practice of war. There was a feeling that a soldier scarcely could make a good Christian. In the middle of the fifth century, Leo the Pope declared it to be contrary to the rules of the Church that persons after the action of penance—that is, persons then considered to be pre-eminently bound to obey the law of Christ—should revert to the profession of arms.22 Various Councils forbade the clergy to engage in warfare,23 and certain canons excluded from ordination all who had served in an army after baptism.24 Penance was prescribed for those who had shed blood on the battle-field.25 Thus the ecclesiastical canons made in William the Conqueror’s reign by the Norman prelates, and confirmed by the Pope, directed that he who was aware that he had killed a man in a battle should do penance for one year, and that he who had killed several should do a year’s penance for each.26 Occasionally the Church seemed to wake up to the evils of war in a more effective way; there are several notorious instances of wars being forbidden by popes. But in such cases the prohibition was only too often due to the fact that some particular war was disadvantageous to the interests of the Church. And whilst doing comparatively little to discourage wars which did not interfere with her own interests, the Church did all the more to excite war against those who were objects of her hatred.
22 Leo Magnus, Epistola XC., ad Rusticum, inquis. 12 (Migne, op. cit. liv. 1206 sq.).
23 One of the Apostolic Canons requires that any bishop, priest, or deacon who devotes himself to military service shall be degraded from his ecclesiastical rank (Canones ecclesiastici qui dicuntur Apostolorum, 83 [Bunsen, Analecta Ante-Nicæna, ii. 31]). The Councils of Toulouse, in 633 (ch. 45, in Labbe-Mansi, op. cit. x. 630), and of Meaux, in 845 (can. 37, ibid. xiv. 827), condemned to a similar punishment those of the clergy who ventured to take up arms. Gratian says (Decretum, ii. 23. 8. 4) that the Church refuses to pray for the soul of a priest who died on the battle-field. Notwithstanding the canons of Councils and the decrees of popes, ecclesiastics frequently participated in battles (Nicolaus I. Epistolæ et Decreta, 83 [Migne, op. cit. cxix. 922]. Robertson, History of the Reign of Charles V. i. 330, 385. Ward, Foundation and History of the Law of Nations, i. 365 sq. Buckle, History of Civilisation in England, i. 204; ii. 464. Bethune-Baker, Influence of Christianity on War, p. 52. Dümmler, Geschichte des Ostfränkischen Reichs, ii. 637).
24 Grotius, De jure belli et pacis, i. 2. 10. 10. Bingham, Antiquities of the Christian Church, iv. 4. 1 (Works, ii. 55).
25 Pœnitentiale Bigotianum, iv. i. 4 (Wasserschleben, Bussordnungen der abendländischen Kirche, p. 453). Pœnit. Vigilanum, 27 (ibid. p. 529). Pœnit. Pseudo-Theodori, xxi. 15 (ibid. p. 587 sq.). Cf. Mort de Garin le Loherain, p. 213: “Ainz se repent et se claime cheti; Ses pechiés plore au soir et au matin, De ce qu’il a tans homes mors et pris.”
26 Wilkins, Concilia Magnæ Britanniæ et Hiberniæ, i. 366.
It has been suggested that the transition from the peaceful tenets of the primitive Church to the essentially military Christianity of the crusades, was chiefly due to the terrors and the example of Islam. “The spirit of Muhammedanism,” says Mr. Lecky, “slowly passed into Christianity, and transformed it into its image.” Until then, “war was rather condoned than consecrated, and, whatever might be the case with a few isolated prelates, the Church did nothing to increase or encourage it.”27 But this view is hardly consistent with facts. Christianity had entered on the war-path already before it came into contact with Muhammedanism. Wars against Arian peoples had been represented as holy wars, for which the combatants would be rewarded by Heaven.28 The war which Chlodwig made upon the Visigoths was not only undertaken with the approval of the clergy, but it was, as Mr. Greenwood remarks, “properly their war, and Chlodwig undertook it in the capacity of a religious champion in all things but the disinterestedness which ought to distinguish that character.” Remigius of Reims assisted him by his countenance and advice, and the Catholic priesthood set every engine of their craft in motion to second and encourage him.29 In the Church itself there were germs out of which a military spirit would naturally develop itself. The famous dictum, “Nulla salus extra ecclesiam,” was promulgated as early as the days of Cyprian. The general view of mediæval orthodoxy was, that those beyond the pale of the Church, heathen and heretics alike, were unalterably doomed to hell, whereas those who would acknowledge her authority, confess their sins, receive the sacrament of baptism, partake of the eucharist and obey the priest, would be infallibly saved. If war was allowed by God, could there be a more proper object for it than the salvation of souls otherwise lost? And for those who refuse to accept the gift of grace offered to them, could there be a juster punishment than death? Moreover, had not the Israelites fought great battles “for the laws and the sanctuary”?30 Had not the Lord Himself commissioned them to attack, subdue, and destroy his enemies? Had He not commanded them to root out the natives of Canaan, who, because of their abominations, had fallen under God’s judgment, and to kill man and beast in the Israelitish cities which had given themselves to idolatry, and to burn all the spoil, with the city itself, as a whole offering to Yahveh?31 There was no need, then, for the Christians to go to the Muhammedans in order to learn the art of religious war. The Old Testament, the revelation of God, gave better lessons in it than the Koran, and was constantly cited in justification of any cruelty committed in the name of religion.32
27 Lecky, History of European Morals, ii. 251 sq.
28 Gibb, loc. cit. p. 86.
29 Greenwood, First Book of the History of the Germans, p. 518.
30 1 Maccabees, xiii. 3. Thomas Aquinas (Summa theologica, ii-ii. 188. 3) quotes this passage in support of the doctrine, that fighting may be directed to the preservation of divine worship.
31 Deuteronomy, xiii. 15 sq.