By the time a marriage is in real trouble, both partners usually have a private theory about why. One of you has quietly concluded that the two of you are just too different. The other suspects it traces back to something that happened years ago and never got repaired. Neither theory came from nowhere. They came from decades of bestsellers, talk shows, and well-meaning friends repeating ideas about why marriages fail that sound like common sense.
Here is the problem: When researchers finally tested those ideas against data from real couples, most of them collapsed.
A Field Built on Opinion
In 1938, Lewis Terman published the first major study of marital happiness and observed that the field was overflowing with confident opinion and remarkably short on evidence. For the next fifty years, not much changed. Most theories about troubled marriages were built in consulting rooms from clinical intuition and passed down as settled truth.
What changed the field was observation. Beginning in the 1970s, researchers like John Gottman and Robert Levenson started recording couples during conflict, coding behavior moment by moment, and following those couples for years to see whose marriages survived. Much of what they and their colleagues found contradicted the profession’s own common sense. Here are five of the most widely believed ideas about failing marriages, and what the research actually showed.
Myth 1: Affairs Are What End Marriages
An affair ends some marriages and devastates many others. But when researchers Lynn Gigy and Joan Kelly at the California Divorce Mediation Project asked divorcing men and women what actually ended their marriages, about 80 percent gave the same answer, and it was not betrayal: They had gradually grown apart and lost the sense of closeness. Infidelity ranked far below.
Even the clinical literature on affairs points in the same direction. Most affairs turn out to be less about sex than about someone finding the attention and friendship that had gone missing at home. The affair is usually a late symptom of an earlier failure. Marriages rarely burn down. Most of them go cold first.
That ordering matters because it changes what repair has to target. If distance is the disease, then rebuilding the friendship is the treatment, whether or not an affair ever happened.
Myth 2: You Are Simply Too Different
“We’re just too different” may be the most common self-diagnosis in marriage, and it comes with impressive-sounding support. John Gray sold millions of books on the premise that men and women are practically different species. Evolutionary writers argued that men are wired to wander while women are wired for security. An older theory, Robert Winch’s need complementarity, held that lasting couples must be matched like puzzle pieces, one dominant and one deferential.
None of it held up. When psychologist Elizabeth Aries reviewed the research on how men and women actually behave inside families, the Mars and Venus stereotype dissolved: Men in families are both emotional and task-oriented, and so are women. In Gottman and Levenson’s analyses of couples’ language during conflict, women used about nine emotion words per minute and men used about eight. That is a rounding error, not a chasm. Winch’s complementarity theory failed so consistently that major research reviews eventually stopped tracking it. And the claim that men are biologically built to stray collapsed on contact with history: As women entered the workforce and gained economic independence, the infidelity gap between men and women narrowed sharply, which points to opportunity, not biology.
Couples do not divorce because they are too different. Every couple is too different. What separates the ones who last is what they do with the differences.
Myth 3: Happy Couples Resolve Their Conflicts
Nearly every couples therapy of the last half century was built on one cornerstone: Teach better communication, resolve the conflicts, save the marriage. Gottman’s longitudinal research found the cornerstone was cracked. In his data, about 69 percent of couple conflict is perpetual. It is rooted in durable differences of personality, temperament, and need, and it never gets fully resolved by anyone, including the happiest couples in the sample.
What distinguishes stable couples is not resolution. It is whether the two of you can keep talking about the unsolvable with some warmth and humor, or whether you gridlock around it until every conversation becomes the same fight wearing different clothes.
The same research explains why communication technique alone underdelivers. Consider mind-reading, which early theorists like Paul Watzlawick flagged as toxic for couples. In direct observation, a mind-read such as “You always go quiet when my dad brings up money” works as an invitation when it arrives with affection, and as an indictment when it arrives with an edge. The words are identical. The delivery decides what the listener’s nervous system receives.
A related idea deserves the same scrutiny: That a marriage cannot be healthy until each partner resolves their childhood first. Research never supported it. People carry family-of-origin wounds into marriage, and those wounds often supply the perpetual themes. But the marriage’s outcome depends on how the two of you manage those themes together, not on whether they ever evaporate.
Myth 4: Good Marriages Run on Fair Exchange
In the 1960s, therapists William Lederer and Don Jackson proposed that healthy marriages operate on an implicit contract: I do for you, you do for me, and trust is the balanced ledger. The idea became therapy doctrine. Then Bernard Murstein and his colleagues tested it in 1977 and found the reverse: Scorekeeping was a marker of distressed marriages and distressed friendships alike. Happy partners give without auditing. The moment either of you becomes an emotional accountant, tallying what was given and never returned, the ledger is not protecting the marriage. It is measuring the damage.
A behavioral cousin of this theory claimed that partners inevitably lose their power to delight each other over time, and that this erosion is itself the disease. Levenson and Gottman’s long-term data showed the opposite: In lasting marriages, partners become more important to each other with the years, and small acts of kindness gain impact rather than losing it. Time is not the enemy. Distance is.
Myth 5: You Should Lower Your Expectations
Perhaps the most corrosive advice a struggling couple receives is to expect less. The reasoning sounds mature: High expectations produce disappointment, so lower the bar and you will suffer less. Donald Baucom at the University of North Carolina spent a decade testing this and found the opposite. People who hold high standards for how they are treated tend to end up in marriages that meet those standards. People who lower their expectations get exactly what they settled for.
Expecting respect, affection, and responsiveness from your partner is not naive. Statistically, it is how people end up receiving them.
What the Research Actually Points To
Strip away the myths and the picture that remains is more specific, and more workable, than the folklore.
Marriages are far more likely to end in distance than in disaster. The friendship erodes first: Fewer questions asked, fewer moments of interest returned, two capable adults running a household side by side. By the time a couple describes themselves as roommates, the pattern is well established. It is also the pattern couples research knows the most about reversing.
One interaction pattern does reliably predict trouble, and Andrew Christensen has documented it across decades of research: Demand and withdraw. One partner presses to engage with the problem while the other pulls away to keep the peace, and each move intensifies the other. The pressing feels like pursuit. The retreating feels like abandonment. Both of you end the conversation more alone than when it started, and neither of you is the defect. The loop is.
Christensen and Neil Jacobson’s later work added the piece their own earlier behavioral model had missed: The deepest injury in distressed couples is the feeling of not being accepted for who you are. Requests for change only land inside acceptance. Outside it, they land as rejection.
And for modern couples aiming at equality, satisfaction does not track a perfect fifty-fifty split of every task. It tracks two perceptions: That the arrangement is fair, and that your partner is emotionally responsive when it counts.
Why This Changes What Help Should Look Like
If the disease were incompatibility, the remedy would be a better match. If it were an unresolved childhood, the remedy would be years of individual work before couples work could even begin. But if the research is right, the mechanisms are a cooling friendship, a demand-withdraw loop, gridlock around permanent differences, and emotional tone that turns ordinary sentences into ammunition. Those are patterns. Patterns can be retrained.
That is why I structure couples work as a defined program rather than open-ended weekly sessions: The research points at specific, trainable systems, and training happens through practice between sessions, not only through insight during them.
If the two of you recognize the quiet version of this story, more distance than fighting, that is not a verdict on the marriage. It is the most common starting point there is. Schedule an initial consultation and we will map your specific pattern together.
FAQ
What is the most common reason marriages end?
Not affairs. In the California Divorce Mediation Project, about 80 percent of divorcing men and women said their marriage ended because they gradually grew apart and lost closeness. Betrayal and open conflict ranked far below emotional distance.
Do happy couples resolve all their conflicts?
No. Gottman’s research found that about 69 percent of couple conflict is perpetual, rooted in lasting differences of personality and need. Happy couples do not resolve these conflicts. They keep a working dialogue about them instead of gridlocking.
Should you lower your expectations in a marriage?
Research by Donald Baucom found the opposite: People who hold high standards for how they are treated tend to be treated well, while people who lower their expectations receive less, not more peace.