Part Three — The Legal Reckoning

Marriage as a Legal Container

The Legal Container

The previous chapters discussed emotion, biology, and statistical trends. This chapter discusses something on an entirely different plane: law.

Law does not care whether you still love each other. Law does not care whether passion has faded, whether intimacy has become friendship, whether two people have slept in the same bed for a decade yet feel like strangers. Law cares about this: what you signed, what you own, what you owe, and what it costs to leave.

This is what "marriage as a legal container" means. It is a pre-packaged bundle of rights and obligations that activates automatically regardless of the emotional content inside. You can love someone madly, and marriage law will not grant you extra protection because of it. You can also maintain a marriage with someone you no longer love, and the law will still bind you to them — in property, debt, decision-making power, even posthumous arrangements.

This is the legal dimension of what earlier chapters called the structural trap: not in the emotional sense, but in the concrete sense that the container survives the relationship it was meant to hold.

A note on scope: this chapter uses the Netherlands as its worked example, because its law is unusually clear and was substantially reformed in 2018. The structural issues it illustrates — default regimes, the cohabitation void, the cost of exit — are broadly comparable across Western jurisdictions, though the specifics differ country by country.

The Default Rules: What You Automatically Signed When You Married

Most people do not know what they signed when they married. They thought they were making an emotional commitment. In reality, they simultaneously entered a complex legal contract — and in most cases they never read the terms, and many never knew the terms existed.

Take the Netherlands as an example. Before January 1, 2018, the default marital property regime in the Netherlands was "general community of property" (algemene gemeenschap van goederen). This meant: all assets and debts acquired before and during the marriage automatically became joint marital property, unless a will or gift explicitly excluded them. The house you bought before marriage? Joint property. The debt you owed before marriage? Joint debt. The inheritance you received? Unless the will used an uitsluitingsclausule (an exclusion clause — common in Dutch testamentary practice, but far from universal), it also fell into the joint estate.

After 2018, the default regime changed to "limited community of property" (beperkte gemeenschap van goederen). Pre-marital assets and debts remain individually owned; only assets and debts acquired during the marriage become jointly owned. Inheritances and gifts also remain individually owned, even if received during the marriage.

The significance of this reform is that legislators finally acknowledged that people's financial situations at the time of marriage and the assets accumulated during the marriage should be treated differently. But the problem is that this default rule is still "one-size-fits-all." It assumes all couples want the same thing.

If you got married before 2018 and never signed a prenuptial agreement, then all your assets and debts — including inheritances, unless explicitly excluded — are joint property. This means that if you inherited money from your parents, your spouse may be legally entitled to half of it. Even if they never met your parents. Even if you never intended to share it.

Married couples can, of course, contract out of some of these defaults through prenuptial agreements — but doing so requires legal knowledge and notarial cost that many couples never undertake.

Cohabitants: The Legal Void

If you think the legal consequences of marriage are complicated, look at the legal situation of cohabitation without marriage. It is even more brutal.

In the Netherlands, there is no principle of "common law marriage." How long you live together does not automatically create any rights or obligations between partners. Married and registered partners are covered by family law; cohabitants must make explicit arrangements to obtain legal certainty.

Without a cohabitation agreement, important issues such as spousal support, pension division, and property division can all work against cohabitants. Without being named as an heir in your partner's will, you have no legal right to inherit. No matter how long you lived together. No matter how much you built together.

This lack of protection can have significant financial consequences when a relationship ends. Cohabitants have no automatic right to spousal support or property division. Ending the cohabitation itself can be as simple as a registered letter; but dividing any jointly owned property or untangling shared finances still requires a legal process.

The most painful scenario is inheritance. Two cohabitants buy a house together, each owning half. One dies unexpectedly. Because they were not married, had no registered partnership, and no cohabitation agreement, the deceased's estate is divided according to law. The deceased's children (from a previous relationship, perhaps) inherit a portion of the house. The surviving partner suddenly finds themselves sharing ownership of their own home with children they may not even know. They cannot decide independently about the home. They may be forced to leave or sell.

This scenario is largely avoidable. A cohabitation agreement with a "residence clause" or a properly drafted will could prevent it. But most people do not know they need these documents. They believe living together is enough. It is not.

Divorce: The Financial Earthquake

When a marriage ends, the legal container must be dismantled. And dismantling it has financial consequences that are substantial, lasting, and unequally distributed. A study by researchers at the University of Groningen, published through the Netspar network, covering approximately 5 million individuals in the Netherlands, found that the financial consequences of divorce are significant, especially for women and older individuals. In the year of divorce, women's net worth was roughly 47% lower than that of women who remained married; for men, the gap was about 27%. These are associations observed in the data, not clean causal estimates.

Home ownership and equity holdings also decreased more sharply for women. The study found that men, in particular, saw reductions in pension wealth — a reflection of Dutch pension-splitting rules on divorce, which divide accrued pension rights between ex-spouses.

The research also documented how family dynamics change after divorce: about a quarter of both men and women had formed a new partnership within the year following divorce. After separation, children were more likely to live with their mother than with their father.

These findings indicate that the financial setbacks resulting from divorce can pose a significant threat to retirement preparedness. This concern is becoming increasingly urgent under the new pension policy, which places greater responsibility on individuals to manage their own retirement savings. The financial impact of divorce tends to intensify with age. This underscores the need to consider divorce as a crucial factor in pension planning — especially as the number of individuals divorcing later in life continues to grow.

What You Actually Take With You

The following mechanics describe the Dutch system specifically; the logic is recognizable across jurisdictions, but the details will differ.

If you own a house together and divorce, the process is mechanical but painful.

First, determine who owns it. Under the general community of property regime, you both own half of the owner-occupied home, even if one of you bought it before the marriage. You are also both responsible for paying the mortgage — joint and several liability, meaning the bank can demand either of you pay the entire debt.

Under the limited community of property regime, the house is jointly owned if you bought it together, or if one of you bought it during the marriage. If either of you purchased the home before the marriage, that person is the owner.

If you both own it, you can divide or sell it. If one of you wants to stay, they must buy out the other's share. If the house is worth more than the remaining mortgage debt, the remaining partner pays half the equity to the departing partner. If the house is worth less than the remaining mortgage debt, the departing partner pays half the negative equity to the partner who remains.

You can also agree to sell. After paying off the mortgage, you each get half the remaining money. If there is still debt after the sale, you are both jointly and severally liable for it.

The mechanics are straightforward. The experience is not. The house that was your home becomes an asset to be liquidated. The life you built together becomes a balance sheet.

The Legal Reform That Did Not Go Far Enough

The 2018 reform was a step forward. It acknowledged that marriage does not mean total merger of financial lives. It gave individuals more control over their pre-marital assets and inheritances.

But it did not address the fundamental problem. The legal container of marriage still bundles together a set of rights and obligations that many people do not want, do not understand, and cannot easily escape. And it still leaves cohabitants — a large and growing share of couples in many Western countries (in the Netherlands, a majority of young couples now cohabit rather than marry) — without adequate legal protection.

The legal system assumes that if you want protection, you should get married. But marriage is no longer the only form of committed partnership. And the law has not caught up.

What the Law Is For

Here is the uncomfortable question: if, as the previous chapters have argued, marriage is no longer the only route to emotional fulfillment, sexual satisfaction, or even child-rearing, what is it for?

The answer, increasingly, is legal and financial. Marriage is a mechanism for organizing property, inheritance, taxation, and decision-making rights. It is a tool. A useful tool, for some. But not the only tool.

The problem is that we have made it the default tool. The one you get if you do not actively choose something else. And the one you cannot easily leave if you change your mind.

The next chapter explores what alternatives might look like: legal frameworks that recognize committed partnership without requiring marriage, and that allow people to define the terms of their own relationships.