However, the foreigner is not entirely, or under all circumstances, devoid of rights. Among the nations of archaic civilisation, as among the lower races, hospitality is a duty, and the life of a guest is as sacred as the life of any of the permanent members of the household. In various cases the commencement of international hostilities is preceded by special ceremonies, intended to justify acts which are not considered proper in times of peace. In ancient Mexico it was usual to send a formal challenge or declaration of war to the enemy, as it was held discreditable to attack a people unprepared for defence;[101] and, according to the fecial law of the Romans, no war was just unless it was undertaken to reclaim property, or unless it was solemnly denounced and proclaimed beforehand.[102] In some cases warfare is condemned, or a distinction is made between just and unjust war with reference to the purpose for which the war is waged. The Chinese philosophers were great advocates of peace.[103] According to Lao-Tsze, a superior man uses weapons "only on the compulsion of necessity";[104] there is no calamity greater {341} than lightly engaging in war,[105] and "he who has killed multitudes of men should weep for them with the bitterest grief."[106] In the Indian poem, Mahabharata, needless warfare is condemned; it is said that the success which is obtained by negotiations is the best, and that the success which is secured by battle is the worst.[107] Among the Hebrews the sect of the Essenes went so far in their reprobation of war that they would not manufacture any martial instruments whatever.[108] Roman historians, even in the case of wars with barbarians, often discuss the sufficiency or insufficiency of the motives "with a conscientious severity a modern historian could hardly surpass."[109] According to Cicero, a war, to be just, ought to be necessary, the sole object of war being to enable us to live undisturbed in peace. There are two modes of settling controversies, he says, one by discussion, the other by a resort to force. The first is proper to man, the second is proper to brutes, and ought never to be adopted except where the first is unavailable.[110] Seneca regards war as a "glorious crime," comparable to murder:--"What is forbidden in private life is commanded by public ordinance. Actions which, committed by stealth, would meet with capital punishment, we praise because committed by soldiers. Men, by nature the mildest species of the animal race, are not ashamed to find delight in mutual slaughter, to wage wars, and to transmit them to be waged by their children, when even dumb animals and wild beasts live at peace with one another."[111] History attests that the Romans, in their intercourse with other nations, did not act upon Cicero's and Seneca's lofty theories of international morality; as Plutarch observes, the two names "peace" and "war" are mostly used only as coins, to procure, not