The Common Law

by Oliver Wendell Holmes

If, now, the ordinary liabilities in tort arise from failure to comply with fixed and uniform standards of external conduct, which every man is presumed and required to know, it is obvious that it ought to be possible, sooner or later, to formulate these standards at least to some extent, and that to do so must at last be the business of the court. It is equally clear that the featureless generality, that the defendant was bound to use such care as a prudent man would do under the circumstances, ought to be continually giving place to the specific one, that he was bound to use this or that precaution under these or those circumstances. The standard which the defendant was bound to come up to was a standard of specific acts or omissions, with reference to the specific circumstances in which he found himself. If in the whole department of [112] unintentional wrongs the courts arrived at no further utterance than the question of negligence, and left every case, without rudder or compass, to the jury, they would simply confess their inability to state a very large part of the law which they required the defendant to know, and would assert, by implication, that nothing could be learned by experience. But neither courts nor legislatures have ever stopped at that point.

From the time of Alfred to the present day, statutes and decisions have busied themselves with defining the precautions to be taken in certain familiar cases; that is, with substituting for the vague test of the care exercised by a prudent man, a precise one of specific acts or omissions. The fundamental thought is still the same, that the way prescribed is that in which prudent men are in the habit of acting, or else is one laid down for cases where prudent men might otherwise be in doubt.

It will be observed that the existence of the external tests of liability which will be mentioned, while it illustrates the tendency of the law of tort to become more and more concrete by judicial decision and by statute, does not interfere with the general doctrine maintained as to the grounds of liability. The argument of this Lecture, although opposed to the doctrine that a man acts or exerts force at his peril, is by no means opposed to the doctrine that he does certain particular acts at his peril. It is the coarseness, not the nature, of the standard which is objected to. If, when the question of the defendant's negligence is left to a jury, negligence does not mean the actual state of the defendant's mind, but a failure to act as a prudent man of average intelligence would have done, he is required to conform to an objective standard at his [113] peril, even in that case. When a more exact and specific rule has been arrived at, he must obey that rule at his peril to the same extent. But, further, if the law is wholly a standard of external conduct, a man must always comply with that standard at his peril.

Some examples of the process of specification will be useful. In LL. Alfred, 36, /1/ providing for the case of a man's staking himself on a spear carried by another, we read, "Let this (liability) be if the point be three fingers higher than the hindmost part of the shaft; if they be both on a level,... be that without danger."

The rule of the road and the sailing rules adopted by Congress from England are modern examples of such statutes. By the former rule, the question has been narrowed from the vague one, Was the party negligent? to the precise one, Was he on the right or left of the road? To avoid a possible misconception, it may be observed that, of course, this question does not necessarily and under all circumstances decide that of liability; a plaintiff may have been on the wrong side of the road, as he may have been negligent, and yet the conduct of the defendant may have been unjustifiable, and a ground of liability. /2/ So, no doubt, a defendant could justify or excuse being on the wrong side, under some circumstances. The difference between alleging that a defendant was on the wrong side of the road, and that he was negligent, is the difference between an allegation of facts requiring to be excused by a counter allegation of further facts to prevent their being a ground of liability, and an allegation which involves a conclusion of law, and denies in advance the existence of an [114] excuse. Whether the former allegation ought not to be enough, and whether the establishment of the fact ought not to shift the burden of proof, are questions which belong to the theory of pleading and evidence, and could be answered either way consistently with analogy. I should have no difficulty in saying that the allegation of facts which are ordinarily a ground of liability, and which would be so unless excused, ought to be sufficient. But the forms of the law, especially the forms of pleading, do not change with every change of its substance, and a prudent lawyer would use the broader and safer phrase.

The same course of specification which has been illustrated from the statute-book ought also to be taking place in the growth of judicial decisions. That this should happen is in accordance with the past history of the law. It has been suggested already that in the days of the assize and jurata the court decided whether the facts constituted a ground of liability in all ordinary cases. A question of negligence might, no doubt, have gone to the jury. Common sense and common knowledge are as often sufficient to determine whether proper care has been taken of an animal, as they are to say whether A or B owns it. The cases which first arose were not of a kind to suggest analysis, and negligence was used as a proximately simple element for a long time before the need or possibility of analysis was felt. Still, when an issue of this sort is found, the dispute is rather what the acts or omissions of the defendant were than on the standard of conduct. /1/ The [115] distinction between the functions of court and jury does not come in question until the parties differ as to the standard of conduct. Negligence, like ownership, is a complex conception. Just as the latter imports the existence of certain facts, and also the consequence (protection against all the world) which the law attaches to those facts; the former imports the existence of certain facts (conduct) and also the consequence (liability) which the law attaches to those facts. In most cases the question is upon the facts, and it is only occasionally that one arises on the consequence.

It will have been noticed how the judges pass on the defendant's acts (on grounds of fault and public policy) in the case of the thorns, and that in Weaver v. Ward /1/it is said that the facts constituting an excuse, and showing that the defendant was free from negligence, should have been spread upon the record, in order that the court might judge. A similar requirement was laid down with regard to the defence of probable cause in an action for malicious prosecution. /2/ And to this day the question of probable cause is always passed on by the court. Later evidence will be found in what follows.

There is, however, an important consideration, which has not yet been adverted to. It is undoubtedly possible that those who have the making of the law should deem it wise to put the mark higher in some cases than the point established by common practice at which blameworthiness begins. For instance, in Morris v. Platt, /2/ the court, while declaring in the strongest terms that, in general, [116] negligence is the foundation of liability for accidental trespasses, nevertheless hints that, if a decision of the point were necessary, it might hold a defendant to a stricter rule where the damage was caused by a pistol, in view of the danger to the public of the growing habit of carrying deadly weapons. Again, it might well seem that to enter a man's house for the purpose of carrying a present, or inquiring after his health when he was ill, was a harmless and rather praiseworthy act, although crossing the owner's boundary was intentional. It is not supposed that an action would lie at the present day for such a cause, unless the defendant had been forbidden the house. Yet in the time of Henry VIII. it was said to be actionable if without license, "for then under that color my enemy might be in my house and kill me." /1/ There is a clear case where public policy establishes a standard of overt acts without regard to fault in any sense. In like manner, policy established exceptions to the general prohibition against entering another's premises, as in the instance put by Chief Justice Choke in the Year Book, of a tree being blown over upon them, or when the highway became impassable, or for the purpose of keeping the peace. /2/

Another example may perhaps be found in the shape which has been given in modern times to the liability for animals, and in the derivative principle of Rylands v. Fletcher, /3/ that when a person brings on his lands, and collects and keeps there, anything likely to do mischief if it escapes, he must keep it in at his peril; and, if he does not do so, is prima facie answerable for all the [117] damage which is the natural consequence of its escape. Cases of this sort do not stand on the notion that it is wrong to keep cattle, or to have a reservoir of water, as might have been thought with more plausibility when fierce and useless animals only were in question. /1/ It may even be very much for the public good that the dangerous accumulation should be made (a consideration which might influence the decision in some instances, and differently in different jurisdictions); but as there is a limit to the nicety of inquiry which is possible in a trial, it may be considered that the safest way to secure care is to throw the risk upon the person who decides what precautions shall be taken. The liability for trespasses of cattle seems to lie on the boundary line between rules based on policy irrespective of fault, and requirements intended to formulate the conduct of a prudent man.

It has been shown in the first Lecture how this liability for cattle arose in the early law, and how far the influence of early notions might be traced in the law of today, Subject to what is there said, it is evident that the early discussions turn on the general consideration whether the owner is or is not to blame. /2/ But they do not stop there: they go on to take practical distinctions, based on common experience. Thus, when the defendant chased sheep out of his land with a dog, and as soon as the sheep were out called in his dog, but the dog pursued them into adjoining land, the chasing of the sheep beyond the defendant's line was held no trespass, because "the nature of a dog is such that he cannot be ruled suddenly." /3/