On Marriage

Marriage is perhaps the most analyzed and least understood human institution. We approach it with a peculiar mix of starry-eyed romanticism and cold legal pragmatism, as if trying to reconcile poetry with contract law. After years of observation, research, and painful personal experience, I’ve come to see marriage not as a binary state of “happily ever after” or “disaster waiting to happen,” but as a complex adaptive system with emergent properties that cannot be fully predicted from initial conditions.

Consider the standard narrative: two people fall in love, make vows seemingly designed to withstand any possible future scenario, and then spend decades navigating challenges that neither could have anticipated at the outset. This arrangement should collapse under its own weight far more often than it does. The fact that many marriages survive and even thrive suggests there’s something interesting happening beneath the surface.

Let’s start with what marriage is not. It is not merely an expression of romantic love, though that’s often the catalyst. It is not primarily a financial arrangement, though economics plays a crucial role. And despite what your Uncle Bob might claim after his third whiskey at the reception, it is not a clever trap designed by women to ensnare men (or vice versa).

Marriage is, at its core, a commitment technology¹. It’s a mechanism humans have developed to solve a specific coordination problem: how to create a stable environment for raising children and building shared assets while mitigating the risks of defection.

The Commitment Problem

In game theory terms, marriage addresses the classic “iterated prisoner’s dilemma” where both parties can benefit enormously from cooperation but face constant temptation to defect². The marriage institution attempts to rewrite the payoff matrix by:

1. Making defection more costly (legal barriers to separation)
2. Increasing the rewards of cooperation (social recognition, tax benefits)
3. Extending the shadow of the future (vows explicitly framing the relationship as lifelong)
4. Creating public accountability (witnesses at the ceremony, shared social circles)

This isn’t romantic, but it’s fascinating in its efficiency. Modern marriages have evolved beyond their historical roots as primarily economic and reproductive arrangements, but they retain these commitment-enforcing mechanisms while adding emotional fulfillment as a primary goal.

What’s interesting is how poorly we understand our own creation. Ask married couples why they got married, and few will respond, “We wanted to establish credible commitment in an environment of uncertainty and information asymmetry.” Yet that’s precisely what marriage accomplishes.

The standard commitment formula – “for better or worse, for richer or poorer, in sickness and health” – isn’t poetic hyperbole but a precise articulation of the terms: I will not defect when conditions change. This is remarkable when you consider that humans are notoriously bad at predicting their future preferences and circumstances³.

When I mention this perspective at dinner parties, people often respond with discomfort. We prefer to frame marriage as a transcendent union of souls rather than a practical solution to commitment problems. But understanding the underlying mechanics doesn’t diminish the beauty of marriage any more than understanding optics diminishes the beauty of a sunset.

In fact, the commitment aspects of marriage create the safety that allows vulnerability and deep emotional connection. By removing the constant low-level uncertainty about whether your partner might walk away after a bad week, marriage creates space for the relationship to deepen beyond what’s possible in arrangements where exit costs are lower.

The Evolutionary Context

Many contemporary discussions about marriage suffer from a failure to consider our evolutionary context. Humans evolved in small bands where reputation effects were powerful, resources were shared unequally, and child-rearing required significant investment from both parents (though in different ways)⁴.

Marriage emerges as a solution to several problems created by these conditions:

• Paternity certainty: In a species where males contribute significantly to offspring but cannot be certain of genetic parentage, pair bonding with public commitment helps address uncertainty
• Resource allocation: Marriage creates a mechanism for pooling resources and investing them in specific offspring
• Risk management: By binding families together, marriage creates extended support networks
• Female mate selection: Marriage helps women secure continued investment from their chosen partners

None of this is to say that marriage is “natural” in the simplistic sense often invoked in political arguments. What’s natural for humans is complex cultural adaptation. Marriage has taken wildly different forms across cultures and eras, from polygyny to polyandry to monogamy, from arrangements focused primarily on property to those centered on personal fulfillment.

What remains constant is the underlying function: creating stable units for child-rearing and resource pooling through public commitment mechanisms.

The modern Western incarnation of marriage – freely chosen, based on mutual attraction, expected to provide emotional fulfillment – is historically unusual. This doesn’t make it wrong, but it does create specific tensions that earlier marriage models didn’t face. When marriage is simultaneously expected to provide economic stability, emotional fulfillment, coparenting partnership, and lifelong sexual satisfaction, it’s carrying a heavier load than previous iterations⁵.

The Success/Failure False Dichotomy

Our discourse around marriage is plagued by a simplistic success/failure dichotomy. We classify marriages that end in divorce as “failed” and those that don’t as “successful,” which misses the point entirely. A marriage that provides a stable environment for raising children to adulthood before dissolving may have successfully served its primary evolutionary function. Conversely, a marriage that persists for decades while making both parties miserable might be a failure despite its longevity.

This binary thinking leads to poor analysis. A more useful framework might consider multiple dimensions of success:

• Did the marriage provide a stable environment for raising children?
• Did it facilitate resource accumulation and protection?
• Did it provide emotional support and fulfillment for the partners?
• Did it allow for personal growth and development?
• Did it end (if it ended) in a way that minimized harm?

By these measures, many “failed” marriages might actually represent partial successes, and many “successful” marriages might be less impressive than their longevity suggests.

The data on marriage is simultaneously encouraging and concerning. Divorce rates peaked in the 1980s and have been declining since, contrary to popular belief⁶. Children raised by stably married parents show better outcomes across numerous measures⁷. Yet marriage rates are declining globally as people delay or forgo this institution.

What interests me is not whether marriage is “good” or “bad” but why it works when it works and fails when it fails. The research suggests several factors that predict marital success:

1. Contempt as a danger sign: John Gottman’s research identifies contempt as the strongest predictor of divorce⁸
2. Friendship as foundation: Couples who genuinely like each other and maintain friendship show greater longevity
3. Repair attempts: The ability to de-escalate conflict predicts relationship success better than conflict frequency
4. Shared narrative: Couples who construct a positive shared story about their relationship tend to maintain satisfaction

None of these factors is mysterious or requires supernatural intervention, yet they’re surprisingly difficult to maintain over decades. This suggests that successful marriage may be less about finding the “right person” and more about building the right practices.

The Rationalist’s Approach

If we take an instrumentalist view, marriage becomes a fascinating optimization problem. Given evolutionary constraints, current legal structures, and personal goals, how should one approach this ancient institution?

For those interested in marriage, I suggest:

1. Explicit modeling: Discuss expectations, deal-breakers, and values before marriage
2. Regular recalibration: Set aside time to evaluate how the marriage is functioning for both parties
3. Pre-commitment to reasonable exit conditions: Paradoxically, defining when it’s appropriate to end a marriage may make it more robust by preventing escalation of unhealthy dynamics
4. Investment in conflict resolution skills: These pay dividends over decades
5. Maintenance of individual identity: Marriage functions better when it’s an alliance of distinct individuals rather than a merger

What’s striking is how rarely couples approach marriage with this level of explicit planning. We would never enter a decades-long business partnership with the level of vague optimism that characterizes most marriages. Yet the stakes in marriage are far higher, involving children, emotional health, and financial security.

Marriage requires rethinking as our society evolves. The institution emerged in agricultural societies with gender roles, economic dependencies, and reproductive limitations that no longer apply. Yet rather than thoughtfully redesigning marriage for modern conditions, we’ve simply layered new expectations onto the existing structure.

The result is an institution asked to simultaneously provide romance, financial security, coparenting partnership, and lifelong companionship – a tall order for any single relationship. Perhaps we need more explicit discussion about which functions we want marriage to serve and which might be better addressed through other social arrangements.

Marriage remains valuable precisely because coordination problems don’t disappear in modern society. We still need stable environments for raising children. We still benefit from pooling resources. We still want credible commitment from our partners. These needs don’t vanish with dating apps, contraception, or economic independence.

What changes is how we address these needs and the tradeoffs we’re willing to make. The success of marriage in any era depends on how well it solves the coordination problems of that specific time and culture.

Our current marriage model struggles because it tries to simultaneously honor individual autonomy and lifelong commitment – values that sometimes conflict. This isn’t a fatal flaw, but it requires more thoughtful navigation than previous marriage models that simply subordinated individual preferences to social expectations.

In the end, marriage isn’t magic or mystical. It’s a human creation designed to solve human problems. Its longevity as an institution speaks to how effectively it addresses certain coordination challenges, but its evolution across cultures demonstrates its adaptability.

The most successful marriages I’ve observed share a common trait: the partners understand, explicitly or intuitively, the game-theoretic nature of their arrangement and work to maintain conditions where cooperation remains the dominant strategy for both. They don’t rely on romantic feelings alone but build systems that support their commitment when emotions fluctuate.

Marriage doesn’t need to be perfect to be valuable. It simply needs to solve certain problems better than the alternatives. For many people in many circumstances, it still does.