Legal Analysis: State Laws Defining Marriage as One Man and One Woman Are Constitutional

Law conceptFrom the Family Research Council’s Marriage on Trial


Those who wish to change the definition of marriage from the union of one man and one woman to a union of any two persons, in order to permit same-sex couples to legally “marry,” have pursued this agenda in state courts, in legislatures, and at the ballot box.

Currently, however, the principal focus is on the federal courts, where dozens of lawsuits have been filed across the country asserting that state laws which limit civil marriage to the union of one man and one woman are in violation of the Constitution of the United States. At this writing, Federal District Court judges in Utah, Oklahoma, Virginia, and Texas have issued rulings declaring a constitutional right to same-sex “marriage.”

This paper is offered as an explanation, in a legally sound but easily understood question-and answer format, of why we believe these decisions are in error; the Constitution and existing Supreme Court precedents permit states to define marriage as the union of one man and one woman; and resolution of the debate over the definition of marriage can and should be left to the democratic process.

Q: What does the Constitution of the United States say about marriage?

A: No provision of the Constitution makes any reference to marriage.

Q: What has the Supreme Court said about state laws that define marriage as the union of one man and one woman (and thus prevent same-sex couples from “marrying”)?

A: The “Proposition 8” Case

In the case challenging California’s marriage amendment (Proposition 8) in 2013, the Supreme Court was urged to declare a federal constitutional right to same-sex “marriage.” The Court declined to do so.

Baker v. Nelson

In 1972, the Supreme Court received an appeal from a Minnesota Supreme Court decision upholding that state’s marriage laws against an early challenge by a homosexual couple. The case was “dismissed for want of a substantial federal question.” This is considered a ruling on the merits and is binding precedent.

Q: What portion of the U. S. Constitution do advocates of redefining marriage believe is violated by state laws defining marriage as the union of a man and a woman?

A: Those asking courts to overturn state marriage definitions argue that they conflict with the “liberty” interest found in the Due Process Clause of the Fourteenth Amendment, and with the Equal Protection Clause of the Fourteenth Amendment.

Q: Do laws defining marriage as the union of one man and one woman violate the “fundamental right to marry?”

A: The Supreme Court has said that there is a “fundamental right to marry”-but only in cases involving opposite-sexmarriages, and often by explicitly linking marriage to procreation and childrearing. There can be no “fundamental right” to marry a person of the same sex, because such a “right” is not “objectively, deeply rooted in this Nation’s history, legal traditions, and practices.”

Q: Do such laws “discriminate” on the basis of sex?

A: If the law clearly puts neither sex at any disadvantage relative to the other, it cannot be asserted that the marriage laws discriminate on the basis of sex.

Q: Do such laws “discriminate” on the basis of “sexual orientation?”

A: The marriage laws are neutral on their face, because marriage licenses do not inquire as to a person’s “sexual orientation.”

Q: But don’t one-man-one-woman marriage definitions have a “disparate impact” on homosexuals?

A: While the definition of marriage has a “disparate impact” on the ability of homosexuals to marry the person of their choice, this alone does not offend the Constitution unless it can be proven that such laws were originally enacted with the sole intent of discriminating against homosexuals.

Q: What standard of review should courts use in cases involving “sexual orientation?”

A: There is no “fundamental right” to marry a person of the same sex. Homosexuals also do not meet any of the criteria for identifying a “suspect” (or “quasi-suspect”) class that calls for “heightened scrutiny.” Therefore, even if courts find that marriage laws do classify on the basis of sexual orientation, such classification is subject only to “rational basis” review, which is highly deferential to legislative choices.

“History of Discrimination”

There has been a long history of disapproval of homosexual conduct, but such conduct-based judgments are not comparable to discrimination based on an innate characteristic such as race.

“Ability to Perform or Contribute to Society”

While homosexuals can “perform or contribute to society,” they cannot “perform or contribute” to the core public purposes of marriage, such as natural procreation and dual-gender parenting.


Homosexual attractions can be changed, although it may not be easy; homosexual behavior, however, is voluntary and can be changed at will.

Political Powerlessness

If anything, homosexuals currently possess a disproportionately high level of political power, relative to the size of that population.

Q: What public purposes of marriage provide a rational basis for limiting it to unions of a man and a woman?

A: The State has legitimate interests in encouraging responsible procreation, in furthering an environment in which the children so procreated will be raised in a family with both a mother and a father to whom they are biologically related and in preserving the traditional institution of marriage.

Responsible Procreation

Only opposite-sex couples can ever procreate naturally, or do so accidentally. (Opposite-sex couples who do not or cannot procreate are still permitted to marry because it would be both practically and legally impossible to exclude them on that basis.)

Encouraging the Raising of Children by Their Mother and Father

Children benefit from having a stable relationship in the home with both biological parents, and from having parental role models of both sexes.

The fact that not all opposite-sex couples have or raise children, and that some people in same-sex relationships do, is not sufficient to prove that it is “irrational” to define marriage as the union of a man and a woman.

Preserving the Institution of Marriage

It is not irrational to speculate that changing the fundamental definition of marriage may change the nature of the institution, especially by further separating marriage, procreation, and family structure. In parts of Europe, recognition of same-sex unions led to a decline in marriage and increase in out-of-wedlock births.

Q: Do other Supreme Court decisions involving “sexual orientation” provide a precedent for overturning state marriage definitions?

A: Romer v. Evans (1996) struck down a state constitutional amendment in Colorado that specifically named those with a “homosexual . . . orientation” and served only to exclude them from seeking special “protected status.” In contrast, marriage laws are neutral on their face and serve positive purposes related to legitimate government interests in responsible procreation.

Lawrence v. Texas (2003) struck down a Texas law against homosexual sodomy. Forbidding a state to punish homosexual relationships is far different from ordering it to celebrate them.

Q: Does the 1967 Supreme Court decision in Loving v. Virginia, which struck down bans on interracial marriage, provide a precedent for overturning laws defining marriage as the union of a man and a woman?

A: The Loving decision did not establish an unlimited right to “marry the person of your choice.” It merely said that such a choice may not be restricted on the basis of race. Laws against interracial marriage built a wall to keep the races apart. Marriage builds a bridge to bring the sexes together.

Q: Does the 2013 Supreme Court ruling in United States v. Windsor, in which the court struck down part of thefederal Defense of Marriage Act, provide a precedent for overturning state marriage definitions?

A: The 1996 federal Defense of Marriage Act (DOMA) said that states would not have to recognize same-sex “marriages” from other states, and that marriage would be defined as the union of one man and one woman for all purposes under federal law.

The latter provision (the federal definition of marriage) was struck down by the Supreme Court in the 2013 case ofUnited States v. Windsor. However, the decision was based largely on DOMA’s deviation from the tradition of the federal government deferring to state definitions of marriage. That same tradition would suggest that the Court should allow states to continue defining marriage as they choose.


Because the Constitution is silent on the subject of same-sex “marriage,” this policy issue should be decided through the democratic process.

Click here to download the entire report from the Family Research Council.

Share this:
Back to blog