To men of a sedate and mature spirit, in whom is any knowledge or mental activity, the detail of battle becomes insupportably tedious and revolting. It is like the talk of one of those monomaniacs whom we sometimes meet in society, who converse on horses; and Fontenelle expressed a volume of meaning when he said, “I hate war, for it spoils conversation.” Nothing is plainer than that the sympathy with war is a juvenile and temporary state. Not only the moral sentiment, but trade, learning and whatever makes intercourse, conspire to put it down. Trade, as all men know, is the antagonist of war. Wherever there is no property, the people will put on the knapsack for bread; but trade is instantly endangered and destroyed. And, moreover, trade brings men to look each other in the face, and gives the parties the knowledge that these enemies over sea or over the mountain are such men as we; who laugh and grieve, who love and fear, as we do. And learning and art, and especially religion weave ties that make war look like fratricide, as it is. And as all history is the picture of war, as we have said, so it is no less true that it is the record of the mitigation and decline of war. Early in the eleventh and twelfth centuries, the Italian cities had grown so populous and strong that they forced the rural nobility to dismantle their castles, which were dens of cruelty, and come and reside in the towns. The popes, to their eternal honor, declared religious jubilees, during which all hostilities were suspended throughout Christendom, and man had a breathing space. The increase of civility has abolished the use of poison and of torture, once supposed as necessary as navies now. And, finally, the art of war, what with gunpowder and tactics, has made, as all men know, battles less frequent and less murderous.