Finnis, John, “Natural Law Theories”, The Stanford Encyclopedia of Philosophy (Fall 2011 Edition), Edward N. Zalta (ed.), URL = .

Human persons are not law’s creatures but its proper point in the United States

Talk of human flourishing’s or wellbeing’s aspects, and of principles of practical reason, should not be allowed to distract attention from an important truth, implicit both in classical Greek and Roman philosophical and juristic treatments of justice and in modern juristic attributions of human rights. Indeed, the Universal Declaration of Human Rights (1948) links the two traditions of discourse by placing at the head of its articulation of human rights the core (“all human beings are born free and equal in dignity and rights”) of the Roman juristic saying (Institutes 1.2.2) that “by nature, from the outset, all human beings were born free and equal,” a saying about iustitia, justice as a ground and standard for ius, law. The same Roman law texts, promulgated as permanent law by Justinian 533–535 AD, state more than once that law’s point (its “final” causa, explanatory reason) is the human persons for whose sake it is made, that is, all human persons until the time when the ius gentium, the common law of peoples, was distorted by wars and slavery. Law, fit to take a directive place in practical reasoning towards morally sound judgment, is for the sake of human persons: all the members of the community regulated by that law and all other persons within that law’s ambit.

That thesis falls within those parts of legal theory that are acknowledged but not much explored by contemporary legal positivists. It was ignored and in effect denied by earlier forms of legal positivism more ambitious to cover the whole of legal philosophy, e.g., Kelsen’s. Kelsen denied that persons were known either to law or to a proper legal theory or science of law, except insofar as they were made the subject of a posited legal rule. But against this restriction, which has misled some courts which have treated Kelsenian legal science as a guide to judicial reasoning, it can be said (Finnis 2000) that the fundamental equality and dignity of human beings should defended as part of a rationally sound understanding (concept) of law. This defense requires an account of the difference between capacities which are activated here and now, or are more or less ready to be so actuated, and radical capacities such as exist in the epigenetic primordia of even very young human beings, and in the genetic and somatic constitution of even the severely disabled. Though such an account makes possible a defense of the fundamental equality of human beings, and thus a humanist legal theory, the point of the account is not to privilege a biological species as such, but to affirm the juridical significance of the status of persons—substances of a rational nature—as inherently the bearers (subjects) of rights of a kind different and more respect-worthy and end-like than the rights which are often, as a matter of technical means, attributed by law to animals, idols, ships or other objects of legal proceedings.
3. Legal principles to remedy defective positive law
3.1 Adjudicating between exclusive and inclusive legal positivism

The positivist thesis that all law depends for its existence, validity and obligatoriness on its social-fact source(s) is often accompanied, as in Raz’s “exclusive legal positivism” (Raz 1980, 212–24; Raz 1985), by the thesis that judges, as the “primary law-applying institutions,” have a duty (moral, if not also legal) to decide certain sorts of case (e.g., cases where the existing legal rule would by work injustice) by applying moral principles or rules which warrant amending or even abandoning part of the existing law. “Inclusive” legal positivists temper this by holding that the judicial duty and authorization to depart from existing law by applying moral rules or principles is restricted to those classes of case where an existing social-fact sourced legal rule directs the court do so; the effect of such a directive, it is said, is to include within the legal system the moral rules or principles (if any) thus pointed to.

Natural law theory concurs with Raz and Gardner in rejecting the inclusivist restriction as ungrounded, but dissents from them in holding (as Dworkin does too: Dworkin 1978, 47) that any moral rule or principle which a court is bound or authorized to apply, precisely as a court, can reasonably be counted or acknowledged as a law, i.e., as a rule or principle which should be considered already part of our law. Against positivists generally, it holds that (i) little or nothing turns on whether or not moral principles binding on courts precisely as courts should be called part of our law; but (ii) if something does turn on the name—if, for example, it be recalled that courts cannot “take judicial notice” of any rule or principle not “part of our law” (and so, as in respect of rules of foreign law, have to hear evidence of the rule’s existence and content)—it is sounder to say that judicially applicable moral rules and principles (unlike applicable foreign law) are ipso iure (i.e., precisely as morally and judicially applicable) rules of law. Such rules belong to the ius gentium portion of our law.

Does this amount to acknowledging that natural law theory is significantly less concerned than contemporary legal positivist theories to establish the precise boundaries and content of the social-fact sourced (posited, purely positive) law of our community? Not really. For (i) contemporary legal positivist theories have abandoned the thesis of “classical” legal positivists such as Bentham that judges and citizens alike should (as a matter of political-moral obligation) comply with the positive law of their community: their treatises or essays on legal theory explicitly or implicitly commend to judges as much as citizens the Hartian “This is law; but it is too iniquitous to be applied or obeyed” (Hart 1961, 203; 1994, 208) rather than the Benthamite “Under a government of laws … obey punctually and … censure freely” (Bentham 1776); so their concern to distinguish posited law from other standards for sound and legitimate adjudication turns out, in the last analysis (and despite appearances), to be merely provisional. And on the other hand (ii) natural law theories hold as strongly as any positivist theory that sound and legitimate adjudication gives priority to a conscientious and craftsmanlike attention to social-fact sources and to rules and principles pedigreed by such sources, sets them aside only if and to the extent that they are “too iniquitous to be applied”, and tailors the resultant new rule so as to cohere as far as possible with all the other (not too iniquitous) doctrines, rules and principles of the particular legal system in which the judge has jurisdiction.
3.1.1 A test case: the Nuremberg question

The persons known as major German war criminals were tried in 1945 for offenses specified in an agreement (“the London Agreement and Charter of 8 August 1945”) made between the states governing Germany since its surrender to them. The judges held that the defendants had at all relevant times been bound by (and in many instances had acted in violation of) the principles or rules specified in the London Charter, such obligations being derived not, of course, from the agreement (which was made subsequent to the acts in question), but rather, as to some of the crimes alleged, from international law and, as to the alleged “crimes against humanity,” from the “elementary dictates of humanity.” To hold the defendants responsible for violating these rules and dictates, and reject any argument that their acts’ compliance with German law could make them lawful acts, was not (so the tribunal ruled) to violate the principle of law and justice that no one should be punished except for violation of law.

The result of these rulings might be accounted for (i) by exclusive positivism: the tribunal was morally authorized to apply moral rules, notwithstanding that the rules so applied were not rules of law either at the time of the crimes or the time of the prosecution. But the terms of the rulings (as just summarized) can be accounted for (ii) by inclusive positivism: the Charter was positive law for the tribunal and directed it to apply moral rules which by virtue of that legal direction were also legal rules. Still, (iii) natural law theory’s account seems the most explanatory: the moral rules applied were also rules of the “higher law” applicable in all times and places (and thus in Germany and its territories, before as after the Charter) as a source of argumentation and judgment “according to law” when the social-fact sources which are the normally dominant and quasi-exclusive source of law are, in justice, inadequate and insufficient guides to fulfilling obligations such as the judicial obligation to do justice according to law, or everyone’s obligation to behave with elementary humanity even when under orders not to—even if those orders have intra-systemic legal validity according to the formal or social-fact criteria of some existing legal system. And if one has doubts about victors’ justice, those very doubts can likewise appeal to principles of the same higher law, ius gentium, or law of reason and humanity.
3.2 Natural law and (purely) positive law as concurrent dimensions of legal reasoning

Natural law theory of law thus finds itself, in this respect, approximated to by Ronald Dworkin’s account of law and adjudication, not only in frontier situations like Nuremberg but also in the day-to-day working of a sophisticated legal system. Normal adjudication and judicial reasoning has two dimensions or criteria for distinguishing correctness from incorrectness in judgments. One dimension comprises social-fact sources (statutes, precedents, practice, etc.), called by Dworkin “legal materials.” The other dimension comprises moral standards, presumptively those prevalent in the judge’s community but in the last analysis just those standards that the judge can accept as in truth morally sound. An interpretation of our law which is morally sounder will be legally correct even if it fits the legal materials less closely than alternative interpretations, provided that it fits those social-fact sources “enough.” The moral standards thus applied, which Dworkin (in line with natural law theory) treats as capable of being morally objective and true, thus function as a direct source of law and, in a certain sense, as already law, except when their fit with the whole set of social-fact sources in the relevant community is so weak that it would be more accurate (according to Dworkin) to say that judges who apply them are applying morality not law (and thus, if they said they were applying law, would be mistaken or lying—a lie which Dworkin considers sometimes commendable). Dworkin 1978, 326–7, 340.

A theory of law which, unlike Dworkin’s, places itself plainly in the tradition of natural law theorizing will be likely to depart from these positions in two ways. (i) It will not accept Dworkin’s thesis that even in very hard cases there is one uniquely correct answer in law; it will deny his assumption that there is a uniquely correct and rationally identifiable measure of how much fit with existing legal materials (social-fact sources) is “enough” (necessary and sufficient) to license using moral standards to identify the legally correct interpretation of the law. In the absence of such a single measure, legal reasoning must often—and in very hard cases, usually—be content to show that two or three alternative interpretations are distinguished from an indefinitely large number of other interpretations by being correct, that is, not wrong (albeit not uniquely correct). (ii) When judges, in order to avoid grave injustice, depart from the settled understanding of the law (and perhaps from the clear terms of a decree) and apply an alternative, morally mandated interpretation, regarding themselves as licensed to do so by the higher law of reason, nature and humanity, they need not be lying if they say that in doing so they are both rectifying and applying the law (of their state). See 4 below.
3.3 Implications of the rule-of-law need for positivity

In line with Dworkin’s two-dimensions account (thus qualified), natural law theory will assent to the thesis that Green makes characteristic of legal positivism:

[1] the fact that a policy would be just, wise, efficient, or prudent is never sufficient reason for thinking that it is actually the law, and [2] the fact that [a law] is unjust, unwise, inefficient or imprudent is never sufficient reason for doubting [that it is law].

For as to [1]: what the rule of law and not of men calls for is the institution of legal system, a corpus iuris, and so what a principle of morality (natural law) or ius gentium implies would be an appropriate rule of law is, nevertheless, not yet a part of our law—still less is a mere “policy” made law by being “prudent” or “efficient—unless its content, conceptualization and form are so shaped, whether in judicial or other juristic thinking or in judgment or legislation, as to cohere with the other parts (especially neighboring parts) of our law.

As to [2]: A natural law theory, mindful of the normal desirability of a rule of law and not of judges (see 1.3), may well be more cautious than Dworkin himself is in departing from the settled (social-fact source-based) law. On those occasions where such a departure is morally warranted, the theory will suggest that the judge is authorized to proceed according to the higher and perennial law of humanity, the ius gentium or set of universal principles of law and justice common to all civilized peoples, which deprives settled law—more precisely, what has been accepted in the jurisdiction as being settled law—of its directiveness for subjects and judges alike. Is this moral authorization also “legal” and “according to law”? Is the settled law which the judge is morally authorized to set aside thereby being treated, even prior to the judge’s handing down of judgment, as not law? The following section argues that that question should be answered both Yes and No.