Marriage law — what the state actually does

When two people apply for a marriage license, they are not drafting an agreement. They are requesting permission to enter a status whose terms have already been written by the legislature. The license is a one-page form; the contract it incorporates is thousands of pages long, distributed across federal and state codes. Nancy Cott describes this as the public nature of marriage: the state is not merely registering a private arrangement, it is conferring a legal status with public consequences. Couples discover the contents of the contract piecemeal — when they file taxes, when one is hospitalized, when one dies, when they divorce. There is no point at which the state hands you the terms and asks you to initial. The license is the only signature it requires, because the license is the consent to everything else. This is unusual in modern contract law, which generally requires meaningful disclosure of material terms. Marriage is the major exception: a contract of adhesion that the state writes, the state enforces, and the parties enter largely blind.

Henry Maine's famous arc — "from status to contract" — described modernization as the replacement of inherited statuses (serf, lord, vassal) with freely chosen contracts. Marriage is the holdout. It remains a status. You cannot negotiate its core terms; you can only opt in or opt out. Hendrik Hartog's Man and Wife in America traces how nineteenth-century courts repeatedly refused to treat marriage as ordinary contract, even as they allowed prenups around the edges. The reason is that status carries third-party effects: creditors, children, the state itself need a stable, recognizable category to deal with. Contract is too flexible. The state needs to know, with one question, whether you are married — yes or no — because that single bit of information triggers hundreds of downstream rules. A contractual marriage with negotiable terms would force every counterparty (bank, hospital, IRS) to read your particular agreement before knowing how to treat you. Status preserves administrative legibility.

What you actually get when you marry is a bundle. Property rights: rules for what each spouse owns during and after the marriage. Support duties: each spouse owes the other financial support, enforceable in court. Inheritance defaults: intestate succession favors the spouse; even with a will, the surviving spouse can claim an elective share. Evidentiary privileges: you cannot be compelled to testify against your spouse, and confidential marital communications are protected. Decision-making: medical, funerary, custodial. Tax treatment: joint filing, marital deduction, gift tax exemption. Immigration sponsorship. Social Security derivative benefits. Health insurance through a spouse's employer. The bundle is not severable — you cannot take the tax benefits without the support duties, or the inheritance rights without the divorce exposure. Hartog calls this the "package deal" theory of marriage. The state will not let you customize.

In 2004, the U.S. General Accounting Office identified 1,138 federal statutory provisions in which marital status is a factor in determining or receiving benefits, rights, or privileges. The list spans the tax code, Social Security, immigration, federal employment, veterans' affairs, healthcare, housing, agriculture, and dozens of other domains. State law adds substantially more — every state has its own family code, probate code, and tax provisions that turn on marital status. The aggregate effect is that marriage is the single most consequential legal status an ordinary American can acquire. Citizenship is more consequential, but citizenship is harder to change. Marriage can be changed in an afternoon at the county clerk's office, and that afternoon will move the holder across hundreds of legal lines simultaneously. No other private act has comparable legal reach.

Most marriage rules are defaults, not mandates — meaning you can modify them by prenuptial agreement, within limits. Prenups can alter property classification (separate vs. community), waive spousal support, and structure inheritance. But prenups cannot waive child support, cannot determine custody in advance, and cannot be unconscionable. Courts review prenups for procedural fairness (was there disclosure? independent counsel? duress?) and sometimes substantive fairness (does enforcement leave a spouse destitute?). Naomi Cahn and June Carbone have written about how prenups, originally tools of wealthy second-marriage estate planning, have spread to first marriages among the educated middle class — a sign that participants increasingly understand marriage as a contract whose default terms they want to modify. The state allows the modification but maintains a floor of protections that cannot be contracted around.

The state is not a passive registrar. It is an active party with interests. It wants to reduce welfare expenditures by enforcing private support obligations. It wants to allocate parental responsibility cheaply through paternity presumptions. It wants to channel sexual and reproductive activity into stable units that produce taxable, educable, conscriptable citizens. Nancy Cott traces how the state has used marriage law to define citizenship itself — historically, by stripping American women of citizenship if they married foreigners (the Expatriation Act of 1907), or by denying marriage to enslaved people, or by criminalizing interracial unions. Marriage law has always been an instrument of state-building, not merely a recognition of private love. Modern marriage law is gentler in its instrumentality, but it remains instrumental.

A child born to a married woman is the husband's child, legally, even if biologically the child is someone else's. This presumption — pater est quem nuptiae demonstrant — predates DNA testing by centuries and survives it. Why? Because the state's interest is in assigning responsibility, not in establishing biological truth. If a married woman gives birth, the state has identified, by default, two adults responsible for the child: her and her husband. Disrupting that assignment requires affirmative legal action, often within strict time limits. Hartog documents nineteenth-century cases where husbands tried, sometimes successfully, sometimes not, to disclaim paternity of children they suspected were not theirs. The courts were reluctant to allow disclaimers because the alternative was a child without a legal father — a public problem. Modern law has loosened the presumption somewhat, but it remains a default that takes work to overcome.

When you marry, certain legal advantages activate without further action. Hospital visitation in jurisdictions where it is contested. Medical decision-making if your spouse is incapacitated. Authority to receive remains and arrange burial. Standing to sue for wrongful death. Testimonial privilege in criminal cases — the state cannot compel you to testify against your spouse, and confidential communications between spouses are privileged from disclosure. These are not small privileges; in a serious illness or criminal investigation, they can be decisive. Unmarried partners can attempt to replicate some of them through powers of attorney, healthcare proxies, and beneficiary designations, but the replication is incomplete and contestable. Marriage is the only single document that grants the whole set. This bundling is part of why marriage equality litigation succeeded: the alternative — assembling the rights piecemeal — was demonstrably inferior and demonstrably more expensive.

Many federal benefits flow from marital status: Social Security spousal benefits, Social Security survivor benefits, Medicare eligibility through a spouse, veterans' dependency and indemnity compensation, federal employee health benefits and pensions, immigration sponsorship, joint tax filing, gift and estate tax marital deductions. The cumulative dollar value over a lifetime can exceed hundreds of thousands of dollars per couple, depending on income and longevity. Lily Batchelder and others have noted that these benefits are not neutral: they advantage some marital configurations (single-earner couples with one high-earning spouse) over others (dual-earner couples with similar earnings), and they advantage married couples over otherwise identical unmarried cohabitants. The federal government has chosen, repeatedly, to use marital status as a rationing device for benefits, which means choosing to marry can be the highest-return financial decision an ordinary person ever makes.

You enter marriage with a signature. You leave it with a court order. No-fault divorce, introduced in California in 1969 and spreading nationally over the next two decades, eliminated the requirement to prove wrongdoing — but it did not eliminate court supervision. A judge must approve property division, spousal support, child support, and custody. Even uncontested divorces require judicial review. The reason is that the state has interests beyond the parties': it wants to ensure dependents are provided for, that property is allocated according to legal rules, that the dissolution does not produce public charges. Exit is more regulated than entry because the costs of bad exit fall more heavily on third parties — children, creditors, the welfare system. The asymmetry is striking: you can enter a marriage in fifteen minutes with no counsel, but exiting one typically takes months and requires legal representation to navigate.

Reformers across the political spectrum have proposed unbundling marriage — separating the state-license function from the bundle of benefits, or moving benefits to individual entitlements rather than marital ones. The proposals fail not because they are bad ideas but because the bundle is load-bearing. Social Security spousal benefits, for example, were designed in the 1930s on the assumption of single-earner male-breadwinner households. Unbundling them today would either require new individual entitlements (expensive) or leave the spouses of low-earning workers with no retirement income (politically untenable). The same logic applies across the bundle. Each component was built for a reason, and each component now has constituencies depending on it. Marriage law has accreted, not been designed; unbundling it would require designing what was never designed, which is harder than it sounds.

For anyone considering marriage, the practical implication is that you are making two decisions, not one. The first is the romantic decision: do you want to spend your life with this person? The second is the legal decision: are you prepared to enter the contract the state has drafted on your behalf? The two decisions are usually made together, often without the second being explicit. But the second has its own analysis. What does the marital property regime look like in your state? Do you want a prenup? How will marriage change your tax exposure, your Social Security trajectory, your immigration status, your liability for your spouse's debts? These are not unromantic questions; they are the actual terms of the partnership. The most clear-eyed couples treat the legal decision with the same seriousness they treat the romantic one, because the state will hold them to it either way.

1. Cott, Nancy F. Public Vows: A History of Marriage and the Nation. Cambridge, MA: Harvard University Press, 2000. 2. Hartog, Hendrik. Man and Wife in America: A History. Cambridge, MA: Harvard University Press, 2000. 3. U.S. General Accounting Office. Defense of Marriage Act: Update to Prior Report. GAO-04-353R. Washington, DC: GAO, January 23, 2004. 4. Cahn, Naomi, and June Carbone. Red Families v. Blue Families: Legal Polarization and the Creation of Culture. New York: Oxford University Press, 2010. 5. Carbone, June, and Naomi Cahn. Marriage Markets: How Inequality Is Remaking the American Family. New York: Oxford University Press, 2014. 6. Maine, Henry Sumner. Ancient Law: Its Connection with the Early History of Society and Its Relation to Modern Ideas. London: John Murray, 1861. 7. Obergefell v. Hodges, 576 U.S. 644 (2015). 8. Cott, Nancy F. "Marriage and Women's Citizenship in the United States, 1830–1934." American Historical Review 103, no. 5 (December 1998): 1440–74. 9. Hartog, Hendrik. "Marital Exits and Marital Expectations in Nineteenth-Century America." Georgetown Law Journal 80, no. 1 (1991): 95–129. 10. Batchelder, Lily L. "Taxing the Poor: Income Averaging Reconsidered." Harvard Journal on Legislation 40, no. 2 (2003): 395–452. 11. Cahn, Naomi. "The New Kinship." Georgetown Law Journal 100 (2012): 367–429. 12. Expatriation Act of 1907, Pub. L. No. 59-193, 34 Stat. 1228 (1907) (repealed 1922 by the Cable Act).