Introduction
One of the most fundamental distinctions
in legal theory is that between "positive legal theory" and "normative
legal theory." This post provides a very brief introduction to the
distinction, aimed at law students (especially first years) with an
interest in legal theory.
The core idea of the distinction between positive and normative legal theory is simple: positive legal theory seeks to explain what the law is and why it is that way, and how laws affect the world, whereas normative legal theories tell us what the law ought to be.
Thus, a positive theory of tort law might seek to explain what causal
forces have produced the existing principles of tort law, whereas a
normative theory of tort law would tell us what rules of tort liability
would be best, right, or justifiable. Or more simply: positive legal theories are about facts and normative legal theories are about values.
Positive Legal Theory
Sometimes, the notion of positive legal theory
is presented in an oversimplified way--as if there were a single,
well-defined type of theory that counted as positive. In fact, the
phrase "positive legal theory" is used in a variety of ways. The one
thing that positive legal theories have in common is that they are not normative. Nonetheless, there are three characteristic type of positive legal theory that can be identified:
Positive Legal Theory Type 1: Doctrinal Theories--The
first kind of legal theory that is called "positive" is quite simply a
theory of what the content of a particular field of legal doctrine is.
Thus, a theory of the freedom of speech might simply seek to explain
the shape of existing first amendment doctrine. Or a theory of hearsay
rule might seek to provide an account of the rule and exceptions that
explains and accurately predicts particular applications of the rule.
Doctrinal legal theories are responsive to questions like, "What are
the principles that shape this area of the law?" or "Can these cases be
explained by some underlying theory?"
Positive Legal Theory Type 2: Explanatory Theories--The
second kind of legal theory to which the label "positive" is applied
are explanatory theories--theories about why the law is the way it is.
For example, a very simple Marxist theory might state that the content
of the law can best be explained by the interests of the ruling class.
Some legal economists have tried to argue that common-law rules are
efficient, because there is "evolutionary pressure" on inefficient
legal rules.
Positive Legal Theory Type 3: Effects Theories--The
third kind of legal theories that are referred to as "positive" are
theories about the consequences that will be produced by a given regime
of legal rules. This is the sense of "positive theory" that is most
frequently invoked by legal economists. The question --"What effects
will a strict liability regime (as opposed to a negligence) regime have
on the manufacturers of consumer products?"--can be answered by a legal
theory that is positive in the sense that it predicts behavior but does
not explicitly evaluate the desirability of the rule.
Normative Legal Theory
Normative legal theories, on the other hand, are by their nature evaluative.
Thus, a normative theory of products liability law would take a stand
on the question whether negligence or strict liability is the better rule.
Normative legal theories tend to be entwined with more general
normative theories, e.g. moral or political theories, although this is
not necessarily the case. The Legal Theory Lexicon already includes entries on deontology, utilitarianism, and virtue ethics--three
of the most important general normative theories that have had an
influence on the law. There are three other distinctions that are
important to understanding the general idea of a normative legal theory:
Ideal versus Nonideal Theory
Some normative legal theories are "ideal"--that is, they are theories
about what the best legal rule would be in the world in which
everything was politically possible, the law could be adequately
enforced, and other legal rules that interact with the subject of the
theory could be adjusted to produce the best overall system. Other
normative legal theories are "nonideal"--that is, they are theories
that assume a variety of constraints on the choice of legal rules. For
example, a nonideal theory might take into account political
feasibility or it might take into account the possibility that the
system would not provide an optimal level of enforcement for the rule
that would otherwise be best. The Legal Theory Lexicon entry on second best explores these ideas in greater detail.
Justificatory Theories and Critical Theories
Normative legal theories also vary in their "attitude" towards the
status quo. You are likely to encounter normative legal theories that
start with the question, "What is the best justification that be given
for such and such a legal rule?" These justificatory theories have a
limited purpose. They do not address the ultimate question, "What is
the best legal rule?" On the other hand, many legal theories have the
opposite purpose--the critique of existing legal doctrine. Thus, a
critical theory might enumerate all of the criticisms that could be
made of an existing legal rule--even though some of the criticisms may
rest on inconsistent premises.
Normative Legal Theories, Political Philosophy, and Comprehensive Moral Theories Another
important issue concerns the relationship of normative legal theory to
other normative theories, especially political philosophy, ethics, and
comprehensive moral theories. Normative political philosphy asks
questions about the normative justification for the state and the
normative principles that establish the ends of and limits on the
content of the law. The term ethics can be defined in various
ways--but for our purposes on this , ethics might be seen as concerned
with the morality of individual action outside the political sphere. A
comprehensive moral theory might encompass both ethics and normative
political philosophy. Normative legal theories have as their domain
the normative evaluation of legal substance and procedure. Normative
theories about the law as a whole might be called "general normative
jurisprudence." There can also be normative theories of particular
legal domains--"normative constitutional theory," "normative tort
theory," and so forth.
One
picture of this relationship normative legal theory, on the one hand,
and moral and political philosophy, on the other, might be called
"top-down." That is, we might start with a comprehensive moral
doctrine (such as utilitarianism or Kant's version of deontology).
Using the method of deduction, we might try to deduce the principles of
political philosophy and ethics from a comprehensive moral theory, and
the principles of normative legal theory might in turn be deduced from
those of political philosophy and ethics. The top-down approach is
exemplified by some consequentialists, who argue for a comprehensive
moral doctrine such as welfarism or utilitarianism and then derive
normative justifications or criticisms from the comprehensive doctrine
and facts about which legal rules will result in what consequences.
Another
possibility is that normative legal theory is relatively independent of
ethics and political philosophy. It is at least conceivable that one
might believe that the realm of interpersonal ethics is governed by a
different set of principles and theories than is the law. For example,
one might espouse deontological ethics, but believe that the laws
should (for the most part) be aimed at maximizing utility.
The Intersection of Positive and Normative Theory
So
far, we have been assuming a fairly sharp distinction between positive
and normative legal theory. And for many purposes, assuming that there
is a bright line that separates normative and descriptive legal theory
is a good working hypothesis. Even assuming there is such a bright
line, however, there are relationships between positive and normative
legal theories.
Positive Theory in the Service of Normative Theory--One
relationship is clear and straightforward. Many normative theories
underdetermine what the legal rules should be in the absence of
substantial information about the effects of the rules. This is most
obvious in the case of utilitarian theories, where information about
consequences does all the real work of determining which legal rule is
best. For normative theories like utilitarianism, positive theory
performs an essential service. Without a positive account of the
effects of a given rule choice, utilitarianism has nothing to say about
what rule is best.
Positive Theory as a Constraint on Normative Theory--Another
relatively noncontroversial relationship between positive and normative
legal theories arises when a positive theory that explains why
the law has the shape that it does, is taken as imposing a constraint
on normative theory. For example, public choice theory makes certain
predictions about how legislatures will act in response to various
incentives. Some legal rules that might be justified by ideal normative
legal theory may be considered "unrealistic" in light of positive
theory. In cases like this, positive legal theory provides constraints
that limit the options available to normative theory.
Interpretivism and "Law as Integrity"--There
is another, more controversial, way that positive and normative legal
theory can interact. Ronald Dworkin's theory of law, "law as
integrity," attempts to combine the aims of positive doctrinal theory
and normative theory. The idea is that a legal theory should both fit and justify the existing legal landscape. Thus, a Dworkinian theory of the freedom of speech would need to both fit the contours of the Supreme Court's decisions and justify those decisions. Of those interpretations of free speech doctrine that fit
the legal topography, Dworkin maintains that judges should select that
interpretation that makes the existing law, "the best that it can be."
Dworkin's view of legal theory blurs the line between positive and
normative legal theory--essentially combining the enterprises that I
have called positive doctrinal theory and justificatory normative
theory. As you might imagine, this is hugely controversial--although
that is a topic for another post.
Conclusion
The
distinction between positive and normative legal theories is
fundamental, but once you have the terminology down, it is usually easy
to apply. The tricky part comes when you are confronted with theories
like Dworkin's that blur the lines between the positive and the
normative. When you do, my advice is that you stay on your toes. A
common mistake is to try to force interpretivist theories into either
the positive or the normative. Although there may be deep reasons of
legal theory that would justify such a forcing move, it will rarely be
productive to start there. A better strategy is to try to understand
such hybrid theories from the inside first. When you are constructing
your own theories, it is always important to be sure you know whether
your theory is positive, normative, or has elements of both. One of the
oft-repeated questions that law professors ask of entry-level
candidates giving job talks (or ambitious students writing papers) is
whether their theory is positive or normative. Be sure you know the
answer before the question is asked!
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(This entry was last revised on June 28, 2009.)