
In
United States constitutional law
The constitutional law of the United States is the body of law governing the interpretation and implementation of the United States Constitution. The subject concerns the scope of power of the United States federal government compared to the indi ...
, the penumbra includes a group of rights derived, by implication, from other rights explicitly protected in the
Bill of Rights
A bill of rights, sometimes called a declaration of rights or a charter of rights, is a list of the most important rights to the citizens of a country. The purpose is to protect those rights against infringement from public officials and pri ...
. These rights have been identified through a process of "reasoning-by-interpolation", where specific principles are recognized from "general idea
that are explicitly expressed in other constitutional provisions. Although researchers have traced the origin of the term to the nineteenth century, the term first gained significant popular attention in 1965, when
Justice
In its broadest sense, justice is the idea that individuals should be treated fairly. According to the ''Stanford Encyclopedia of Philosophy'', the most plausible candidate for a core definition comes from the ''Institutes (Justinian), Inst ...
William O. Douglas
William Orville Douglas (October 16, 1898January 19, 1980) was an American jurist who served as an associate justice of the Supreme Court of the United States from 1939 to 1975. Douglas was known for his strong progressive and civil libertari ...
's majority opinion in ''
Griswold v. Connecticut
''Griswold v. Connecticut'', 381 U.S. 479 (1965), is a landmark decision of the U.S. Supreme Court in which the Court ruled that the Constitution of the United States protects the liberty of married couples to use contraceptives without gove ...
'' identified a
right to privacy
The right to privacy is an element of various legal traditions that intends to restrain governmental and private actions that threaten the privacy of individuals. Over 185 national constitutions mention the right to privacy.
Since the globa ...
in the penumbra of the constitution.
Origins of the term
Commentators disagree about the precise origin of the use of the term ''penumbra'' in American legal scholarship, but most believe it was first used in the late nineteenth century. Burr Henly, for example, traces the first use of the word to an 1873 law review article written by
Oliver Wendell Holmes, in which he argued that it is better for new law to grow "in the penumbra between darkness and light, than to remain in uncertainty". Luis Sirico and Henry T. Greely, on the other hand, trace the term to Justice
Stephen Johnson Field
Stephen Johnson Field (November 4, 1816 – April 9, 1899) was an American jurist. He was an Associate Justice of the United States Supreme Court from May 20, 1863, to December 1, 1897, the second longest tenure of any justice. Prior to this ap ...
's 1871 circuit court opinion in ''Montgomery v. Bevans'', where Justice Field used the term to describe a period of time in which it was uncertain whether an individual could legally be considered deceased. Other commentators, including Glenn H. Reynolds and Brannon P. Denning, note that elements of penumbral reasoning can be found in much older cases that precede the first use of the term ''penumbra''; they trace the origins of penumbral reasoning to United States Supreme Court cases from the early nineteenth century. For example, Reynolds and Denning describe
Chief Justice John Marshall
John Marshall (September 24, 1755July 6, 1835) was an American statesman, jurist, and Founding Fathers of the United States, Founding Father who served as the fourth chief justice of the United States from 1801 until his death in 1835. He remai ...
's opinion in ''
McCulloch v. Maryland
''McCulloch v. Maryland'', 17 U.S. (4 Wheat.) 316 (1819), was a landmark U.S. Supreme Court decision that defined the scope of the U.S. Congress's legislative power and how it relates to the powers of American state legislatures. The dispute in ...
'' as "the quintessential example of penumbral reasoning".
Definition

Although the meaning of the term has varied over time, scholars now generally agree that the term refers to a group of rights that are not explicitly stated in the constitution, but can be inferred from other enumerated rights. The definition of the term was originally derived from its primary scientific meaning, which is "a space of partial illumination (as in an eclipse) between the perfect shadow on all sides and the full light".
[ By analogy, rights that exist in the constitution's penumbra can be found in the "shadows" of other portions of the constitution. Additionally, the process of identifying rights in constitutional penumbras is known as ''penumbral reasoning''. Brannon P. Denning and Glenn H. Reynolds have described this interpretive framework as the process of "drawing logical inferences by looking at relevant parts of the Constitution as a whole and their relationship to one another." Glenn H. Reynolds has also characterized penumbral reasoning as a process of "reasoning-by-interpolation" where judges identify the full scope and extent of constitutional rights.
]
Definitions prior to ''Griswold v. Connecticut''
The term ''penumbra'' first appeared in an opinion published by the Supreme Court of the United States
The Supreme Court of the United States (SCOTUS) is the highest court in the federal judiciary of the United States. It has ultimate appellate jurisdiction over all Federal tribunals in the United States, U.S. federal court cases, and over Stat ...
in 1916, and the term appeared ten more times in published opinions between 1916 and 1941. Between 1941 and the date of publication of ''Griswold v. Connecticut'', the term was used eight times by Justice William O. Douglas and four times by other Justices. Second Circuit Court of Appeals
The United States Court of Appeals for the Second Circuit (in case citations, 2d Cir.) is one of the thirteen United States Courts of Appeals. Its territory covers the states of Connecticut, New York, and Vermont, and it has appellate jurisdic ...
Judge Learned Hand
Billings Learned Hand ( ; January 27, 1872 – August 18, 1961) was an American jurist, lawyer, and judicial philosopher. He served as a federal trial judge on the U.S. District Court for the Southern District of New York from 1909 to 1924 a ...
also used the term eleven times between 1915 and 1950, usually to place emphasis on words or concepts that were ambiguous. For example, in ''Commissioner v. Ickelheimer'', Judge Hand wrote, " e colloquial words of a statute have not the fixed and artificial content of scientific symbols; they have a penumbra, a dim fringe, a connotation, for they express an attitude of will, into which it is our duty to penetrate and which we must enforce ungrudgingly when we can ascertain it, regardless of imprecision in its expression".
Before ''Griswold'', different Supreme Court Justices would often utilize different definitions of the term in different contexts, possibly because the Justices did not understand the meaning of the word. In ''Schlesinger v. Wisconsin'', for example, Justice
In its broadest sense, justice is the idea that individuals should be treated fairly. According to the ''Stanford Encyclopedia of Philosophy'', the most plausible candidate for a core definition comes from the ''Institutes (Justinian), Inst ...
Oliver Wendell Holmes used the term to describe rights derived by implication. He wrote, "the law allows a penumbra to be embraced that goes beyond the outline of its object in order that the object may be secured". Likewise, in ''Olmstead v. United States
''Olmstead v. United States'', 277 U.S. 438 (1928), was a decision of the Supreme Court of the United States, on the matter of whether wiretapping of private telephone conversations, conducted by federal agents without a search warrant with reco ...
'', Justice Holmes argued that evidence obtained through wire-tapping
Wiretapping, also known as wire tapping or telephone tapping, is the monitoring of telephone and Internet-based conversations by a third party, often by covert means. The wire tap received its name because, historically, the monitoring connecti ...
should not be admitted at trial, and that "the penumbra of the Fourth and Fifth Amendments covers the defendant". However, in '' A.L.A. Schecter Poultry Corp. v. United States'', Justice Benjamin Cardozo
Benjamin Nathan Cardozo (May 24, 1870 – July 9, 1938) was an American lawyer and jurist who served on the New York Court of Appeals from 1914 to 1932 and as an Associate Justice of the Supreme Court of the United States from 1932 until his deat ...
used the term to describe an area of uncertainty in the law. He wrote, " ere is no penumbra of uncertainty obscuring judgment here. To find immediacy or directness here is to find it almost everywhere". Additionally, in '' Coleman v. Miller'', Justice Felix Frankfurter
Felix Frankfurter (November 15, 1882 – February 22, 1965) was an American jurist who served as an Associate Justice of the Supreme Court of the United States from 1939 until 1962, advocating judicial restraint.
Born in Vienna, Frankfurter im ...
used the term in a manner that was more closely related to its traditional definition. When arguing that a group of legislators lacked standing
Standing, also referred to as orthostasis, is a position in which the body is held in an upright (orthostatic) position and supported only by the feet. Although seemingly static, the body rocks slightly back and forth from the ankle in the ...
, he wrote, " doubt the bounds of such legal interest have a penumbra which gives some freedom in judging fulfillment of our jurisdictional requirements".
Definition after ''Griswold v. Connecticut''
J. Christopher Rideout and Burr Henly note that the term achieved prominence after Justice Douglas' majority opinion in ''Griswold v. Connecticut'' held that a right to privacy existed in the penumbra of the constitution. In ''Griswold'', the Supreme Court ultimately held that a Connecticut
Connecticut ( ) is a U.S. state, state in the New England region of the Northeastern United States. It borders Rhode Island to the east, Massachusetts to the north, New York (state), New York to the west, and Long Island Sound to the south. ...
law that criminalized the use of contraception
Birth control, also known as contraception, anticonception, and fertility control, is the use of methods or devices to prevent pregnancy. Birth control has been used since ancient times, but effective and safe methods of birth control only be ...
was unconstitutional.[''Griswold'', 381 U.S. at 482–83.] Writing for a majority of the Court, Justice Douglas held that the Connecticut law violated a fundamental right to privacy.[ After reviewing a line of cases in which the Supreme Court identified rights not explicitly enumerated in the constitution, Justice Douglas declared that " e foregoing cases suggest that specific guarantees in the Bill of Rights have penumbras, formed by emanations from those guarantees that help give them life and substance".][ Justice Douglas argued that the Court could infer a right to privacy by looking at "zones of privacy" protected by ]First
First most commonly refers to:
* First, the ordinal form of the number 1
First or 1st may also refer to:
Acronyms
* Faint Images of the Radio Sky at Twenty-Centimeters, an astronomical survey carried out by the Very Large Array
* Far Infrared a ...
, Third
Third or 3rd may refer to:
Numbers
* 3rd, the ordinal form of the cardinal number 3
* , a fraction of one third
* 1⁄60 of a ''second'', i.e., the third in a series of fractional parts in a sexagesimal number system
Places
* 3rd Street (di ...
, Fourth, Fifth, and Ninth
In music, a ninth is a compound interval consisting of an octave plus a second.
Like the second, the interval of a ninth is classified as a dissonance in common practice tonality. Since a ninth is an octave larger than a second, its ...
Amendments:
Consequently, Justice Douglas argued that the constitution included "penumbral rights of privacy and repose." Justice Douglas also remarked that without "peripheral rights," the "specific rights" enumerated in the constitution would be "less secure". According to Burr Henly, Justice Douglas' majority opinion did not use the term to identify the articulable boundaries of language and the law, as Justice Holmes had done, but rather to connect the text of the constitution to unenumerated rights
Unenumerated rights are legal rights inferred from other rights that are implied by existing laws, such as in written constitutions, but are not themselves expressly stated or "enumerated" in law. Alternative terms are implied rights, natural righ ...
.
Scholarly analysis of penumbral reasoning
Helen Hershkoff has described penumbral reasoning as "an important feature of American constitutional practice in cases involving individual rights and government power", and J. Christopher Rideout notes that many scholars have defended the "conceptual integrity" of penumbral reasoning. Likewise, Burr Henly has described the penumbra as "the most important" metaphor in American constitutional jurisprudence. Other scholars, including Judge A. Raymond Randolph
Arthur Raymond Randolph (born November 1, 1943) is an American lawyer and jurist serving as a senior U.S. circuit judge of the U.S. Court of Appeals for the District of Columbia. He was appointed to the D.C. Circuit in 1990 by President George H. ...
of the and historian David J. Garrow, also note that Justice Douglas' identification of the right to privacy in ''Griswold'' ultimately served as a doctrinal stepping-stone to ''Roe v. Wade
''Roe v. Wade'', 410 U.S. 113 (1973),. was a List of landmark court decisions in the United States, landmark decision of the U.S. Supreme Court in which the Court ruled that the Constitution of the United States protected the right to have an ...
'', where the United States Supreme Court ruled that the right to privacy protects the right to terminate a pregnancy.
Glenn H. Reynolds has also observed that courts routinely engage in penumbral reasoning, regardless of their location on the political spectrum. However, former Ninth Circuit
The United States Court of Appeals for the Ninth Circuit (in case citations, 9th Cir.) is the U.S. federal court of appeals that has appellate jurisdiction over the U.S. district courts for the following federal judicial districts:
* District ...
Judge Alex Kozinski
Alex Kozinski (; born July 23, 1950) is a Romanian-American jurist and lawyer who was a judge on the U.S. Court of Appeals for the Ninth Circuit from 1985 to 2017. He was a prominent and influential judge, and many of his law clerks went on to ...
and UCLA School of Law
The University of California, Los Angeles School of Law (commonly known as UCLA School of Law or UCLA Law) is the law school of the University of California, Los Angeles.
History
Founded in 1949, the UCLA School of Law is the third oldest of t ...
professor Eugene Volokh
Eugene Volokh (; born Yevhen Volodymyrovych Volokh (); February 29, 1968) is an American legal scholar known for his scholarship in American constitutional law and Libertarianism in the United States, libertarianism as well as his prominent leg ...
note that the use of penumbral reasoning by courts "cuts both ways" because it can be used to both expand individual liberties and to expand the powers of the government at the expense of individual liberty. Richard E. Levy also argued that penumbral reasoning, fundamental rights
Fundamental rights are a group of rights that have been recognized by a high degree of protection from encroachment. These rights are specifically identified in a constitution, or have been found under due process of law. The United Nations' Susta ...
analyses, and political process theory can justify judicial intervention on behalf of individual liberty as well as judicial intervention to advance economic interests.
Despite the "pivotal" role that penumbral reasoning has played in American constitutional jurisprudence, the Supreme Court's use of penumbral reasoning has also generated controversy. District of Columbia Circuit Judge Robert Bork
Robert Heron Bork (March 1, 1927 – December 19, 2012) was an American legal scholar who served as solicitor general of the United States from 1973 until 1977. A professor by training, he was acting United States Attorney General and a judge on ...
, for example, was a particularly vocal critic of Supreme Court rulings that identified rights that are not explicitly enumerated in the text of the constitution. Likewise, in his dissenting opinion in ''Griswold'', Justice Hugo Black
Hugo Lafayette Black (February 27, 1886 – September 25, 1971) was an American lawyer, politician, and jurist who served as a U.S. Senator from Alabama from 1927 to 1937 and as an Associate Justice of the Supreme Court of the United States, ass ...
stated his concerns with finding a right to privacy in the penumbra of the constitution and that he disagreed with the majority's attempts to "stretch" the Bill of Rights. Additionally, Louis J. Sirico Jr. has described the term as "intellectually confusing", and William J. Watkins Jr. wrote that the penumbra of the constitution is "a seemingly strange place to discover constitutional guarantees". Robert J. Pushaw Jr. also described penumbral reasoning as a "transparently fictional" process, and Jennifer Fahnestock has cautioned that "implicit constitutional rights" are vulnerable to being lost "due to their lack of permanency".[Jennifer Fahnestock]
''Renegotiating the Social Contract: Healthcare as a natural Right''
72 549, 553 (2011).
See also
* United States Bill of Rights
The United States Bill of Rights comprises the first ten list of amendments to the United States Constitution, amendments to the United States Constitution. It was proposed following the often bitter 1787–88 debate over the Timeline of dr ...
* Birth control movement in the United States
The birth control movement in the United States was a social reform campaign beginning in 1914 that aimed to increase the availability of contraception in the U.S. through education and legalization. The movement began in 1914 when a group of pol ...
References
{{DEFAULTSORT:Penumbra (Law)
Privacy law
Privacy in the United States