By this famous word taboo, of Polynesian origin, is to be understood a very important part of what I have called the protoplasm of primitive religion, and one closely allied both to magic and fetishism. For our present purposes we may define it as a mysterious influence believed to exist in objects both animate and inanimate, which makes them dangerous, infectious, unclean, or holy, which two last qualities are often almost identical in primitive thought, as Robertson Smith originally taught us.[25] What exactly the savage or semi-civilised mind thought about this influence we hardly yet know; we have another Polynesian word, mana, which expresses conveniently its positive aspect, and may in time help us towards a better understanding of it.[26] It is in origin pre-animistic, i.e. it is not so much believed to emanate from a spirit residing in the object, as from some occult miasmatic quality. All human beings in contact with other men or things possessing this quality are believed to suffer in some way, and to communicate the infection which they themselves receive. As Dr. Farnell says in his chapter on the ritual of purification,[27] "The sense-instinct that suggests all this was probably some primeval terror or aversion evoked by certain objects, as we see animals shrink with disgust at the sight or smell of blood. The nerves of savage man are strangely excited by certain stimuli of touch, smell, taste, sight; the specially exciting object is something that we should call mysterious, weird, or uncanny."

Based on this notion of constant danger from infection, there arose a code of unwritten custom as rigid as that enforced by a careful physician in infectious cases at the present day; and thus, too, in course of time there was developed the idea of the possibility of disinfection, an idea as salutary as the discovery in medical science of effective methods for the disinfection of disease. The code of taboo had an obvious ethical value, as Dr. Jevons pointed out long ago;[28] like all discipline carried out with a social end in view, it helped men to realise that they were under obligations to the community of which they were a part, and that they would be visited by severe penalties if they neglected these duties. But it inevitably tended to forge a set of fetters binding and cramping the minds of its captives with a countless number of terrors; life was full of constant anxiety, of that feeling expressed by the later Romans in the word religio,[29] which, as we shall see, probably had its origin in this period of primitive superstition. The only remedy is the discovery of the means of disinfection, or, as we commonly call it, of purification: a discovery which must have been going on for ages, and only finds its completion at Rome in the era of the City-state. We shall return to this part of the subject when we deal with the ritual of purification; at present we must attend to certain survivals in that ritual which suggest that at one time the ancestors of the Roman people lived under this unwritten code of taboo.

Let us see, in the first place, how human beings were supposed to be affected by this mysterious influence under certain circumstances and at particular periods of their existence. As universally in primitive life, the newborn infant must originally have been taboo; for every Roman child needed purification or disinfection, boys on the ninth, girls on the eighth day after birth. This day was called the dies lustricus, the day of a purificatory rite; "est lustricus dies," says Macrobius, "quo infantes lustrantur et nomen accipiunt."[30] In historical times the naming of the child was doubtless the more practically important part of the ceremony; though we may note in passing that the mystic value attaching to names, of which there are traces in Roman usage, may have even originally given that part a greater significance than we should naturally attribute to it.[31] Again, when the child reaches the age of puberty, it is all the world over believed to be in a critical or dangerous condition, needing disinfection; of this idea, so far as I know, the later Romans show hardly a trace, but we may suppose that the ceremony of laying aside the toga of childhood, which was accompanied by a sacrifice, was a faint survival of some process of purification.[32] Once more, after a death the whole family had to be purified with particular care from the contagion of the corpse,[33] which was here as everywhere taboo; a cypress bough was stuck over the door of the house of a noble family to give warning to any passing pontifex that he was not to enter it;[34] and those who followed the funeral cortège were purified by being sprinkled with water and by stepping over fire.[35] Society had effectually protected itself against the miasma in all these cases by the discovery of the means of disinfection.

One of the commonest forms of taboo is that on women, who, especially at certain periods, were apparently believed to be "infectious."[36] Of this belief we have very distinct survivals in Roman ritual, which I must here be content to mention only, leaving details to trained anthropologists to explain. We find them both in sacra privata and sacra publica. Cato has preserved the formula for the propitiation of Mars Silvanus in the private rites of the farm; it is to take place in silva, and its object is the protection of the cattle, doubtless those which have been turned out to pasture in the forest, and are therefore in danger from evil beasts and evil spirits. Now this res divina may be performed either by a free man or a slave, but no woman may be present, nor see what is going on.[37] In sacra publica women were excluded from the cult of Hercules at the Ara Maxima, and were not allowed to swear by the name of that god; facts which are usually connected with the doubtful identification of Hercules with Genius, or the male principle of life.[38] More conclusive evidence of taboo in the case of women is the fact that at certain sacrifices they were ordered to withdraw, both mulieres and virgines, together with other persons to be mentioned directly.[39] Unfortunately we are not told what those sacrifices were; but it seems clear enough that there had been at one time a scruple (religio) about admitting women of any age to certain sacred rites. If so, it is remarkable how the good sense of the Roman people overcame any serious disabilities which might have been produced by such ideas; the Roman woman gained for herself a position of dignity, and even of authority, in her household, which had very important results on the formation of the character of the people.[40] Traces of the old superstition doubtless continued to survive in folklore; an example, interesting because it seems to illustrate the positive aspect of taboo (mana), may be found by the curious in Pliny's Natural History, xxviii. 78.

Another widely-spread example of the class of ideas we are discussing is the belief that strangers are dangerous. Dr. Frazer tells us that "to guard against the baneful influence exerted voluntarily or involuntarily by strangers is an elementary dictate of savage prudence." You have to disarm them of their magical powers, to counteract "the baneful influence which is believed to emanate from them."[41] Of this feeling he has collected a great number of convincing illustrations. We find it also surviving in Roman ritual. A note, referred to above, which has come down to us from the learned Verrius Flaccus, informs us that at certain sacrifices the lictor proclaimed "hostis vinctus mulier virgo exesto," where hostis has its old meaning of stranger.[42] This is, of course, merely the old feeling of taboo surviving in the religious ritual of the City-state, and is also no doubt connected with the belief that the recognised deities of a community could not be approached by any but the members of that community; but its taproot is probably to be found in the ideas described by Dr. Frazer. We can illustrate it well from the ritual of another Italian city, Iguvium in Umbria, which, as I mentioned in a note to my last lecture, has come down to us in a very elaborate form. In the ordinance for the lustratio populi of that city the magistrate is directed to expel all members of certain neighbouring communities by a thrice-repeated proclamation.[43] Such fear of strangers is not even yet extinct in Italy. Professor von Duhn told me that once when approaching an Italian village in search of inscriptions he was taken for the devil, being unluckily mounted on a black horse and dressed in black, and was met by a priest with a crucifix, who was at last persuaded to "disinfect" him with holy water as a condition of his being admitted to the village. But the Romans of historical times, in this as in so many other ways, discovered easy methods of overcoming these fears and scruples: we find a good example of this in the organised college of Fetiales, who, on entering as envoys a foreign territory, were fully protected by their sacred herbs, carried by a verbenarius, against all hostile contamination.[44]

A remark seems here necessary about the apparent inconsistency between this feeling of anxiety about strangers and the well-known ancient Italian practice of hospitium, by which two communities, or two individuals, or an individual and a community, entered into relations which bound them to mutual hospitality and kindness in case of need:[45] a practice so widely spread and so highly developed that it may be considered one of the most valuable civilising agents in the early history of Italy. There is, however, no real inconsistency here. In the first place, the stranger who was removed on the occasion of solemn public religious rites may be assumed not to have been in possession of the ius hospitii with the Roman state, and in any case it must be doubtful whether that ius would give him the right of being present at all sacrificial rites. Secondly, the researches of Dr. Westermarck have recently, for the first time, made it clear that both the taboo on strangers and the very widely-spread practice of hospitality can ultimately be traced down to the same root. The stranger is dangerous; but for that very reason it is desirable to secure his good-will at once. He may have the evil eye; but if so, it is as well to disarm him by offering him food and drink, and, when he has partaken of these, by entering into communion with him in the act of partaking also yourself. Expediency would obviously suggest some such remedy for the danger of his presence, and this would in course of time, in accordance with the instinct of Romans and Italians, grow into a set of rules sanctioned by law as well as custom—the ius hospitii.[46]

Hostis vinctus mulier virgo exesto. We have noticed traces of taboo on women and strangers: what of the vinctus? This is, so far as I know, the only proof we have that a man in chains was thought to be religiously dangerous. I am not sure how his expulsion from religious rites is to be explained. It is, however, as well to note that criminals were in primitive societies thought to be uncanny, probably because the commonest of all crimes, if not the only one affecting society as a whole, was the breaking of taboo, which made the individual an outcast.[47] And we may put this together with the fact that in the early City-state such outcasts were probably not kept shut up in a prison, but allowed to wander about secured with chains; this seems a fair inference from the power which the priest of Jupiter (Flamen Dialis) possessed of releasing from his chains any prisoner who entered his house, i.e. who had taken refuge there as in an asylum.[48] Thus the fettered criminal, who was certainly not a citizen, might find his way to the place where a sacrifice was going on, and have to submit to expulsion together with the strangers. It is, however, also possible that the iron of the chains, if they were of iron, made him doubly dangerous; for, as we shall see directly, iron was taboo, and the chains of the prisoner who took refuge with the Flamen had to be thrown out of the house, no doubt for this reason, by the impluvium.[49]

Turning to inanimate objects, which are supposed by primitive man to be dangerous or taboo, we are met by a fact which will astonish anthropologists, and which I cannot satisfactorily explain. Blood is everywhere in the savage world regarded with suspicion and anxiety; there is something mysterious about it as containing (so they thought) the life, and its colour and smell are also uncanny; horses cannot endure it, and there are still strong men who faint at the sight of it. Yet at Rome, so far as I can discover, there was in historical times hardly a trace left of this anxiety in its original form of taboo; the religious law had effectually eliminated the various chances that might arouse it. No student of Roman religious antiquities seems to have noticed this singular fact. No anthropologist, as far as I know, has observed that among the many taboos to which the Flamen Dialis was subject, blood does not appear. The reason no doubt is that anthropologists are not as a rule Roman historians; their curiosity is not excited by a fact which must have some explanation in Roman religious history. From a single passage of Festus (p. 117) we learn that soldiers following the triumphal car carried laurel "ut quasi purgati a caede humana intrarent urbem"; and this is the only distinct relic of the idea that I can find. Pliny's Natural History, that wonderful thesaurus of odds and ends, affords no help; the mystic qualities of blood are hardly alluded to there, and the same can be said of Servius' commentary on the Aeneid. The word blood is not to be found in the index to Wissowa's great work, of which the supreme value is its accurate record of the religious law and all the ceremonies of the State. I am constrained to believe that the priests or priest-kings who developed the ius divinum of the Roman City-state deliberately suppressed the superstition, for reasons which it is impossible to conjecture with certainty. And this guess, which I put forward with hesitation, is indeed in keeping with certain other facts of Roman life. It is doubtful whether human sacrifice ever existed among this people;[50] it is certain that the execution of citizens in civil life by beheading was abandoned at a very early period.[51] The shedding of blood, except when a victim was sacrificed under the rules of sacred law, was carefully avoided; thus the horror of blood had a social and ethical result of value, instead of remaining a mere religio (taboo). It is true that in one or two rites, such as that of the October horse, the blood of a sacrifice seems to have been thought to possess peculiar powers;[52] but it is at the same time noticeable that this rite is not included in the old calendar, a fact of which a wholly satisfactory explanation has not yet been offered. In the Lupercalia there is a trace of the mystic use of blood in sacrifice, but a very faint one: to this we shall return later on. The two Luperci had their foreheads smeared with the knife bloody from the slaughter of the victims, but the blood was at once wiped off with wool dipped in milk.[53] This rite is of course in the old calendar; it stands almost alone in its mystical character, and may have been taken over by the Romans from previous inhabitants of the site of Rome. Lastly, in the Terminalia, or boundary-festival of arable land in country districts, the boundary-stone was sprinkled with the blood of the victims, showing that a spirit, or numen, was believed to reside in it;[54] but I cannot find that this practice survived in the public sacrifices of the city. It is found only in the sacrifices (Graeco ritu) supervised by the XV viri sacris faciundis in that part of the Ludi Saeculares of Augustus which was concerned with Greek chthonic deities in the Campus Martius.[55]

Yet unquestionably there had been a time when many inanimate objects were supposed to have a mystic or dangerous influence; this is sufficiently proved by the long list of taboos to which the unfortunate Flamen Dialis was even in historical times subject. He was forbidden to touch a goat, a dog, raw meat, beans, ivy, wheat, leavened bread; he might not walk under a vine, and his hair and nails might not be cut with an iron knife; and he might not have any knot or unbroken ring about his person. Dr. Frazer has the merit of being the first to point out the real meaning of this strange list of disabilities, and to explain the mystic or miasmatic origin of some of them.[56] They need not detain us now, as they are survivals only, and survivals of ideas which must have been long extinct before Roman history can be said to begin. Almost the only one among them of which we have other traces is the taboo on iron, which must have been of comparatively late date, as the use of iron in Italy seems only to have begun about the eighth century B.C.[57] This is found also in the ritual of the Arval Brotherhood, the ancient agricultural priesthood revived by Augustus, and better known to us than any other owing to the discovery of its Acta in the site of the sacred grove between Rome and Ostia. These Brethren had originally suffered from the taboo on iron; but in characteristic fashion they had discovered that a piacular or disinfecting sacrifice would sufficiently atone for its use whenever it was necessary to take a pruning-hook within the limits of the grove.[58] We may here also recall the fact that no iron might be used in the building or repairing of the ancient pons sublicius, the oldest of all the bridges of the Tiber.[59]

Every one who wishes to get an idea of the nature of taboo in primitive Rome, and of the way in which it was got rid of, should study the disabilities of the Flamen Dialis, and satisfy himself of their absence, with the exception just mentioned, and possibly one or two more, in the ritual of historical Rome. Nothing is more likely to convince him of the way in which Roman civilisation contrived to leave these superstitions as mere fossils, incapable any longer of doing mischief by cramping the conscience and inducing constant anxiety. If he is disposed to ask why such a large number of these fossils should be found attached to the priesthood of Jupiter, I must ask him to let me postpone that question, which would at this moment lead us too far afield.