Prenuptial agreements started nearly 4,000 years ago. The oldest surviving rules governing marriage, dowry, and the financial fallout of divorce appear in the Code of Hammurabi around 1750 BCE, and written contracts between spouses or their families have shown up in nearly every major civilization since. The modern version, the kind an American lawyer drafts today for a couple planning a wedding, is much younger: courts only began enforcing prenups that address divorce in 1970. Everything in between is a long story about property, protection, and who gets to speak for themselves in a marriage.
Hammurabi and Ancient Mesopotamia
The earliest surviving legal code to deal with marriage contracts came out of Babylon during the reign of King Hammurabi, roughly 1792 to 1750 BCE.1Encyclopaedia Britannica. Code of Hammurabi – Summary and History Among its 282 laws are detailed rules on marriage, dowry, divorce, and the financial consequences of separation.2Online Library of Liberty. The Code of Hammurabi A husband who wanted to leave a childless wife had to return her full dowry plus an additional payment before the separation could proceed.3The Web Site of Professor Paul Brians. The Code of Hammurabi 18th Century BCE A wife who could show that her husband had neglected her could take her dowry and go back to her father’s household without penalty.
The property at stake was livestock, land, grain, and precious metals, the agricultural wealth families wanted to keep intact across generations. The underlying logic is the same one that drives a modern prenup: define who gets what before anything goes wrong, and hold both sides to the deal.
Ancient Egypt
Egyptians treated marriage mainly as a property arrangement. The Egyptian words for marriage translate to “mooring a boat” and “founding a house.”4Fathom. Ancient Egyptian Society and Family Life Written contracts specified that each spouse kept whatever property they brought in, and whatever came in during the marriage was held jointly. Neither temple nor state formalized the marriage itself; the contract between the families was what made it binding.
Some of the surviving papyri are remarkably specific. One document from 263 BCE records a husband’s promise to give his wife half of everything he owned and everything he would acquire going forward.5Penn Museum. Marriage and Divorce in Ancient Egypt Fifth-century BCE contracts from Jewish communities in Persian-era Egypt show the same practice crossing cultural lines in the region.
The Hebrew Ketubah
The ketubah is the most enduring example of a prenuptial-style contract in any legal tradition. The earliest surviving one, written in Aramaic on papyrus, was found in Egypt and dates to roughly 440 BCE.6Library of Congress. The Ketubah, An Ornate Jewish Marriage Tradition It became central to Jewish marriage during the Talmudic period, roughly 70 to 500 CE, and rabbinical authorities treated it as so fundamental that a couple was prohibited from living together without one.7Beinecke Rare Book and Manuscript Library. Art of the Ketubah – Decorated Jewish Marriage Contracts
The ketubah spelled out the husband’s obligations to his wife, including food, clothing, and shelter, plus a fixed monetary settlement she would receive if he died or ended the marriage. Two witnesses and a public reading during the ceremony made those obligations a matter of community record rather than a private promise. The design was to make divorce financially consequential enough that a husband could not simply walk away.
Greek and Roman Marriage Agreements
The Greek world produced its own detailed contracts. A surviving marriage contract from Tebtunis, Egypt, dated 92 BCE, records a husband named Philiscus acknowledging receipt of a dowry worth two talents and four thousand drachmas of copper. The contract prohibits him from bringing another wife or concubine into the household, bans him from mistreating Apollonia or wasting their joint property, and requires full return of the dowry (plus a fifty-percent penalty for delay) if the marriage dissolved.8Diotima. A Marriage Contract Behavior clauses, financial penalties, property protections, all in a single document roughly two thousand years before the Uniform Premarital Agreement Act.
Roman law pushed the idea further through the dos, or dowry system. A husband was responsible for returning the dowry if the marriage ended by death or divorce, even if he had already spent it. Later reforms under the Emperor Justinian in the sixth century CE allowed husbands to make matching gifts to their wives during marriage, creating a more reciprocal financial structure. Roman thinking on marital property shaped European law for centuries and laid the groundwork for the medieval systems that followed.
The Islamic Mahr
The mahr, a mandatory payment from the groom to the bride, became a core element of the Islamic marriage contract starting in the seventh century CE. The custom itself predates Islam, rooted in pre-Islamic Arabian tribal practices in which a payment went to the bride’s family. Islamic law redirected it to the bride herself, making it her personal property. Because traditional Islamic family law does not recognize shared marital assets or alimony in the Western sense, the mahr serves as the primary financial protection for a wife if her husband divorces her or dies.
The amount is negotiated before the marriage and can be paid immediately or deferred, which gives it a distinctly prenuptial character. American courts have occasionally had to decide how to treat a mahr when a couple divorces under secular law, generally holding that it cannot override standard property division but may be enforceable as a standalone contract depending on its terms and the jurisdiction.
Coverture and Jointures in Medieval England
English common law took a sharply different approach through the doctrine of coverture. The moment a woman married, her independent legal identity effectively disappeared into her husband’s. Before the wedding she could own property, sign contracts, and sue in her own name; after it, she and her husband were a single legal person, and that person was him.9Encyclopaedia Britannica. Coverture
Wealthy families worked around this with premarital arrangements called jointures. A jointure set aside a specific portion of land or income for a wife’s benefit if she outlived her husband, replacing the traditional dower right that typically entitled a widow to one-third of her husband’s estate. The negotiations happened between the families’ patriarchs, usually with lawyers drafting trusts and life estates designed to keep ancestral property in the intended bloodline. The point was less about the couple’s preferences than about dynastic wealth management, but the mechanics were unmistakably prenuptial.
The Nineteenth-Century Property Reforms
Coverture came apart over the 1800s. The United Kingdom’s Married Women’s Property Act of 1882 let a married woman acquire, hold, and dispose of property as if she were unmarried, and to enter contracts and sue in her own name without her husband’s involvement.10Legislation.gov.uk. Married Women’s Property Act 1882 American states passed parallel reforms, starting with New York’s Married Women’s Property Act of 1848, which protected a woman’s pre-marriage property from her husband’s control and creditors.11National Women’s History Museum. New York State Married Women’s Property Act of 1848
These reforms changed what a prenup even was. Once women could own property, hold bank accounts, and run businesses independently, the elaborate family-negotiated settlements of earlier centuries became less necessary. At the same time, the same legal personhood that ended coverture made it possible for individuals to negotiate their own premarital contracts as equals. The modern prenup, a private agreement between two people with independent legal standing rather than a deal between two families, became possible.
Posner v. Posner and the Modern Prenup
Through most of the twentieth century, American courts refused to enforce prenuptial agreements that addressed divorce. The reasoning was paternalistic: judges worried that laying out divorce terms in advance would encourage couples to split up. Prenups dealing with inheritance after death were generally fine. Anything contemplating divorce was struck down as against public policy.
That changed in 1970, when the Florida Supreme Court decided Posner v. Posner. The court recognized that divorce had become a social reality and held that prenuptial agreements should no longer be automatically void. The conditions it set: the agreement had to be fair, both parties needed full knowledge of each other’s finances, and the divorce had to be pursued in good faith rather than manufactured to trigger the agreement.12Justia. Posner v Posner It was the first major appellate ruling in the country holding that a prenup addressing divorce could be enforced, and other states quickly followed.
In 1983, the Uniform Law Commission released the Uniform Premarital Agreement Act to create a consistent framework across state lines.13Uniform Law Commission. Premarital and Marital Agreements Act The UPAA requires that prenups be in writing and signed voluntarily by both parties, with adequate financial disclosure. At least 26 states and the District of Columbia eventually adopted it. In 2012, the Commission followed up with the Uniform Premarital and Marital Agreements Act, extending similar protections to agreements signed after the wedding and tightening procedural safeguards for both.
What a Modern Prenup Still Cannot Do
Even after four thousand years of evolution, some things remain outside the reach of a premarital contract. A prenup cannot predetermine child custody or child support in any American jurisdiction. Courts decide those issues based on the child’s best interests at the time of divorce, and a contract signed before a child exists cannot override that standard. An agreement that is unconscionable at signing, or that becomes unconscionable by the time someone tries to enforce it, can be struck down even if both parties signed voluntarily and knew what the other owned. Lifestyle and behavioral clauses, like financial penalties for infidelity, are enforceable in some states and void in others.
The through-line from Hammurabi to today is remarkably steady. Was the deal fair, did both sides know what they were signing, and was anyone forced into it? The answers have always decided whether a marriage contract holds up.