Marriage is preventive medicine

I am planning a wedding. There are guest lists, the careful cartography of who can tolerate whom, and the flower discourse—which began as a single question and has since expanded, like a government agency, to fill every available conversation, car journey, and Saturday morning I had previously considered my own. The process has a way of focusing the mind. But somewhere between the seating chart and the catering invoice, a more serious question begins to surface: what exactly am I signing up for?

For me, the answer begins long before I ever met my fiancée. It begins at home.

My parents have been married 32 years. They had me when young, with no cushion beneath them and no safety net waiting. My father worked the land. My mother worked the wards. Long days, early mornings, tired evenings, and a household where nothing arrived easily and nothing was thrown away.

I watched them carry each other through the hard years, with financial stress that would fracture weaker unions and the low-grade anxieties of raising a child when you are still figuring life out yourself. They didn’t pretend it was easy. It wasn’t. But they stayed. They adapted. They endured. They loved each other then and love each other still, without condition.

Which is why a new study on marriage and cancer caught my attention. Researchers drawing on data from millions of Americans across multiple states found that never-married adults face substantially higher cancer rates than those who have been married. Never-married men had about 68 percent higher incidence. For women, it was closer to 83 percent.

Dismiss that as coincidence if you want, but the patterns are too consistent, too widespread, and too persistent across different populations to wave away. They hold across races, across age groups, across most major cancer types. And the cancer study is far from alone. A substantial body of research links marriage to lower rates of heart disease, faster recovery from illness, and longer life overall. The biological fingerprints of a good marriage turn up in places you would not expect.

The reasons are not mysterious.

Marriage introduces a gravitational pull that solitude simply cannot replicate. There is someone watching, someone noticing, someone insisting you go to the doctor when you would rather not. Someone who cares enough about your cholesterol to bring it up at dinner. Someone who loves you enough to notice the bad habits and invested enough to say something about every single one of them.

Anyone who has lived inside a strong marriage knows it runs deeper than behavior. It is psychological. It is emotional. It is the difference between carrying the weight of life alone and sharing it. Chronic stress is, in the most literal sense, a health crisis. It degrades immune function, disrupts sleep, and accelerates cellular aging. Marriage, at its best, interrupts that process—not by eliminating stress but by ensuring no one faces it alone.

None of this is to say that all marriages are glorious. Some cause genuine harm, and that harm shows up in the body the same way loneliness does. But that is a case for better judgment, not a case against marriage. The institution, when it works, works extraordinarily well. And yet fewer people are choosing it.

Marriage is in retreat. It’s treated as optional by some, outdated by others, and not worth the trouble by a growing number. The median age at first marriage keeps climbing. The culture offers replacements—cohabitation, casual arrangements, sovereign independence—but none impose the same discipline or build the same durable bond. Cohabitation, in particular, tends to lack the formal commitment that seems to drive the health benefits. The research is fairly clear on this: The legal and social act of marriage does something that living together can never fully replicate. The vow is not incidental. The public declaration and shared name create the conditions under which people actually change their attitudes, take care of each other, and build something they are reluctant to walk away from.

And yet when we talk about why cancer rates are climbing in America, including among younger people, we talk about diet, environmental toxins, and genetics. These are real factors, but the social architecture of health barely gets mentioned. Who you come home to turns out to matter as much as what you eat. The way people organize their private life tends to show up, sooner or later, in their bloodwork.

My father told me once that marrying my mother was the best decision he ever made. He said it simply, the way people say things that were never really up for debate. I am only now catching up to what he meant, and I suspect I will spend the rest of my life being glad that I listened.