“Against [a] background of lawful same-sex marriage in some States, the design, purpose, and effect of DOMA should be considered as the beginning point in deciding whether it is valid under the Constitution. By history and tradition the definition and regulation of marriage, as will be discussed in more detail, has been treated as being within the authority and realm of the separate States. Yet it is further established that Congress, in enacting discrete statutes, can make determinations that bear on marital rights and privileges…
“[Although] federal laws that regulate the meaning of marriage in order to further federal policy [can be constitutional], DOMA has a far greater reach; for it enacts a directive applicable to over 1,000 federal statutes and the whole realm of federal regulations. And its operation is directed to a class of persons that the laws of New York, and of 11 other States, have sought to protect.
“In order to assess the validity of that intervention it is necessary to discuss the extent of the state power and authority over marriage as a matter of history and tradition. State laws defining and regulating marriage, of course, must respect the constitutional rights of persons, see, e.g., Loving v. Virginia, 388 U. S. 1 (1967); but, subject to those guarantees, “regulation of domestic relations” is “an area that has long been regarded as a virtually exclusive province of the States.” Sosna v. Iowa, 419 U. S. 393, 404 (1975).
“The recognition of civil marriages is central to state domestic relations law …
“Consistent with this allocation of authority, the Federal Government, through our history, has deferred to state-law policy decisions with respect to domestic relations…
“The States’ interest in defining and regulating the marital relation, subject to constitutional guarantees, stems from the understanding that marriage is more than a routine classification for purposes of certain statutory benefits. Private, consensual sexual intimacy between two adult persons of the same sex may not be punished by the State, and it can form “but one ele-ment in a personal bond that is more enduring.” Lawrence v. Texas, 539 U. S. 558, 567 (2003)… This status is a far-reaching legal acknowledgment of the intimate relationship between two people, a relationship deemed by the State worthy of dignity in the community equal with all other marriages. It reflects both the community’s considered perspective on the historical roots of the institution of marriage and its evolving understanding of the meaning of equality.
“DOMA seeks to injure the very class New York seeks to protect. By doing so it violates basic due process and equal protection principles applicable to the Federal Government. See U. S. Const., Amdt. 5; Bolling v. Sharpe, 347 U. S. 497 (1954). The Constitution’s guarantee of equality “must at the very least mean that a bare congressional desire to harm a politically unpopular group cannot” justify disparate treatment of that group. Department of Agriculture v. Moreno, 413 U. S. 528, 534–535 (1973). In determining whether a law is motived by an improper animus or purpose, “ ‘[d]iscriminations of an un- usual character’ ” especially require careful considera- tion. Supra, at 19 (quoting Romer, supra, at 633). DOMA cannot survive under these principles. The responsibility of the States for the regulation of domestic relations is an important indicator of the substantial societal impact the State’s classifications have in the daily lives and customs of its people. DOMA’s unusual deviation from the usual tradition of recognizing and accepting state definitions of marriage here operates to deprive same-sex couples of the benefits and responsibilities that come with the federal recognition of their marriages. This is strong evidence of a law having the purpose and effect of disapproval of that class. The avowed purpose and practical effect of the law here in question are to impose a disadvantage, a separate status, and so a stigma upon all who enter into same-sex marriages made lawful by the unquestioned au-thority of the States.
“The history of DOMA’s enactment and its own text demonstrate that interference with the equal dignity of same-sex marriages, a dignity conferred by the States in the exercise of their sovereign power, was more than an incidental effect of the federal statute. It was its essence. The House Report announced its conclusion that “it is both appropriate and necessary for Con-gress to do what it can to defend the institution of traditional heterosexual marriage. . . . H. R. 3396 is appropriately entitled the ‘Defense of Marriage Act.’ The effort to redefine ‘marriage’ to extend to homosexual couples is a truly radical proposal that would fundamentally alter the institution of marriage.” H. R. Rep. No. 104–664, pp. 12–13 (1996). The House concluded that DOMA expresses “both moral disapproval of homosexuality, and a moral conviction that heter-osexuality better comports with traditional (especially Judeo-Christian) morality.” Id., at 16 (footnote deleted). The stated purpose of the law was to promote an “interest in protecting the traditional moral teachings reflected in heterosexual-only marriage laws.” Ibid. Were there any doubt of this far-reaching purpose, the title of the Act confirms it: The Defense of Marriage.
“…The Act’s demonstrated purpose is to ensure that if any State decides to recognize same-sex marriages, those unions will be treated as second-class marriages for purposes of federal law. This raises a most serious question under the Constitution’s Fifth Amendment.
“DOMA’s operation in practice confirms this purpose. When New York adopted a law to permit same-sex marriage, it sought to eliminate inequality; but DOMA frustrates that objective through a system-wide enactment with no identified connection to any particular area of fed- eral law. DOMA writes inequality into the entire United States Code. The particular case at hand concerns the estate tax, but DOMA is more than a simple determination of what should or should not be allowed as an estate tax refund. Among the over 1,000 statutes and numerous federal regulations that DOMA controls are laws pertaining to Social Security, housing, taxes, criminal sanctions, copyright, and veterans’ benefits.
“DOMA’s principal effect is to identify a subset of state-sanctioned marriages and make them unequal. The principal purpose is to impose inequality, not for other reasons like governmental efficiency. Responsibilities, as well as rights, enhance the dignity and integrity of the person. And DOMA contrives to deprive some couples married under the laws of their State, but not other couples, of both rights and responsibilities. By creating two contradictory marriage re-gimes within the same State, DOMA forces same-sex couples to live as married for the purpose of state law but unmarried for the purpose of federal law, thus diminishing the stability and predictability of basic personal relations the State has found it proper to acknowledge and protect. By this dynamic DOMA undermines both the public and private significance of state-sanctioned same-sex marriages; for it tells those couples, and all the world, that their otherwise valid marriages are unworthy of federal recognition. This places same-sex couples in an unstable position of being in a second-tier marriage. The differentiation demeans the couple, whose moral and sexual choices the Constitution protects, see Lawrence, 539 U. S. 558, and whose relationship the State has sought to dignify. And it humiliates tens of thousands of children now being raised by same-sex couples. The law in question makes it even more difficult for the children to understand the integrity and closeness of their own family and its concord with other families in their community and in their daily lives.
“Under DOMA, same-sex married couples have their lives burdened, by reason of govern-ment decree, in visible and public ways. By its great reach, DOMA touches many aspects of married and family life, from the mundane to the profound. It prevents same-sex married couples from obtaining government healthcare benefits they would otherwise receive…
“DOMA also brings financial harm to children of same-sex couples. It raises the cost of health care for families by taxing health benefits provided by employers to their workers’ same-sex spouses. And it denies or reduces benefits allowed to families upon the loss of a spouse and parent, benefits that are an integral part of family security.
“DOMA divests married same-sex couples of the duties and responsibilities that are an es-sential part of married life and that they in most cases would be honored to accept were DOMA not in force. …
[T]hough Congress has great authority to design laws to fit its own conception of sound na-tional policy, it cannot deny the liberty protected by the Due Process Clause of the Fifth Amendment.
…DOMA is unconstitutional as a deprivation of the liberty of the person protected by the Fifth Amendment of the Constitution.
“The liberty protected by the Fifth Amendment’s Due Process Clause contains within it the prohibition against denying to any person the equal protection of the laws. See Bolling, 347 U. S., at 499–500; Adarand Constructors, Inc. v. Peña, 515 U. S. 200, 217–218 (1995). While the Fifth Amendment itself withdraws from Government the power to degrade or demean in the way this law does, the equal protection guarantee of the Fourteenth Amendment makes that Fifth Amendment right all the more specific and all the better understood and preserved.
“The class to which DOMA directs its restrictions and restraints are those persons who are joined in same-sex marriages made lawful by the State. DOMA singles out a class of persons deemed by a State entitled to recognition and protection to enhance their own liberty. It im-poses a disability on the class by refusing to acknowledge a status the State finds to be dignified and proper. DOMA instructs all federal officials, and indeed all persons with whom same-sex couples interact, including their own children, that their marriage is less worthy than the mar-riages of others. The federal statute is invalid, for no legitimate purpose overcomes the purpose and effect to disparage and to injure those whom the State, by its marriage laws, sought to pro-tect in personhood and dignity. By seeking to displace this protection and treating those per-sons as living in marriages less respected than others, the federal statute is in violation of the Fifth Amendment. This opinion and its holding are confined to those lawful marriages.”