This movement to redeem at least a part of the days from fighting and violence came gradually to embrace all the countries of Western Europe. The details of the various edicts issued by Church councils and popes vary greatly, but all embody the principle of the edict of 1041. Holydays, and especially consecrated periods, as Easter time and Christmas week, came to be covered by the Truce. The Council of Clermont, which inaugurated the First Crusade, extended greatly the terms of the Truce, forbidding absolutely private wars while the Crusade lasted, and placing under the ægis of the Church the person and property of every crusader.
The Truce of God was never well observed, yet it did something during the eleventh and twelfth centuries to mitigate the evils of private war and to render life more secure and tolerable. After the twelfth century the kings of Europe, who were now strengthening their authority and consolidating their dominions, took the place of the Church in maintaining peace among their feudal vassals. They came to regard themselves as responsible for the “peace of the land,” which phrase now superseded those of the “Peace of God” and the “Truce of God.” Thus the movement to which moral forces had given the first impulse was carried to its consummation by political motives. To the Church, however, history will ever accord the honor of having begun this great reform which enforced peace upon the members of the same state, and which has made private wars in civilized lands a thing of the past.
The abolition of private warfare was the first decisive step marking the advance of Europe toward universal peace. Public war, that is, war between nations, is still an established and approved institution of international law; but in the moral evolution of humanity a time approaches when public war shall also, like private war, be placed under the ban of civilization, and will have passed upon it by the truer conscience of that better age the same judgment that the conscience of to-day pronounces on that private warfare upon which the Truce of God laid the first arresting hand.
Progress in the ethics of war: sale into slavery of Christian captives condemned
Although the Church has done little in a direct way to abolish public war, or even directly to create in society at large a new conscience in regard to the wickedness of war in itself as an established method of settling international differences, its influence has been felt from early Christian times in the alleviation of its barbarities and cruelties. One of the first ameliorations in the rules of war effected through Christian influence concerned the treatment of war captives.
Among the ancient Greeks, as we have seen, under the influence of the sentiment of Panhellenism, there was developed a vague feeling that Greeks should not enslave Greeks. But aside from this Panhellenic sentiment, which had very little influence upon actual practice, there was in the pre-Christian period seemingly little or no moral feeling on the subject, and the custom of reducing prisoners of war to slavery was practically universal.
But the custom, in so far as it concerned Christian prisoners, was condemned by the Christian conscience as incompatible with the spirit of Christianity, and the rule was established that such captives should not be enslaved.[689] We observe the first clear workings of this new war conscience in Britain after the conversion of the Saxon invaders. The Celts of Britain were Christians, and the Saxons, after they themselves had been won over to Christianity, ceased to sell into slavery their Celtic captives. Gradually this new rule was adopted by all Christian nations. No other advance of equal importance marks the moral history of public war during the medieval period.
This humane rule, however, did not, as we have intimated, embrace non-Christians. Our word “slave” bears witness to this fact. This term came to designate a person in servitude from the circumstance that up to the eleventh century, which saw the evangelization of Russia, the slave class in Europe was made up largely of Slavs, who, as pagans, were without scruple reduced to slavery by their Christian captors.
But the earlier rights which the immemorial laws of war conferred upon the captor were not wholly annulled in the case of Christian captives. The practice of holding for ransom took the place of sale into slavery. This custom prevailed throughout the feudal period, but gradually during the seventeenth and eighteenth centuries this practice finally yielded to the more humanitarian custom of exchange of prisoners.[690] Thus in this department of ethics there is to be traced a gradual humanization of the code, which, beginning in savagery with gross cannibalism and torture, advances through killing in cold blood, sale into slavery, and holding for ransom, to equal exchange.
Morality in the monasteries: moral significance of the rise of the Mendicant Orders