sibling relationships

The Resilience of Sibling Relationships

How siblings bond, why they fight and what makes them so important

When I was 7, I told my 4-year-old brother that his real sister was taken to “Land Kazoozoo,” and I was her replacement, a witch who could look like anyone she wanted. I can still remember the beat of fear in his big brown eyes, and to this day I’m not sure he’s fully dismissed the possibility that I’m an evil imposter.

At 8, I called my older sister a “seed head”—an improvised jab at her shiny dark hair and the shape of her head. At the time, I thought the lame insult had died on contact, and I would have forgotten it entirely had my sister not exhumed it; on her wedding day, no less. She said she still thinks about it every time she puts her hair up.

We are clay when we first meet our siblings, says Jeffrey Kluger in a Ted Radio Hour podcast “How We Love,” and “practically set and kiln fired by the time we meet most of our friends and our spouses. But our siblings shape us, we learn from our siblings.”

I’d been thinking about all of this a lot while visiting my siblings over the holidays and simultaneously reading Kluger’s book The Sibling Effect, which shines a light on some of the interesting science around the sibling bond, much of which has only come out in the last 15 years.

Kluger says it’s not necessarily shared genetic material that makes sibling relationships so powerful, but rather shared experiences. My own brood of three, which I’m wedged in the middle of with a couple of years on both sides, is like a poster-case for birth order stereotypes—the achievement-driven oldest (a trait shared by only children), the straying middle, and the outgoing, funny youngest. The studies are so compelling and numerous that I plan a follow-up column on the subject.

What’s amazing to me, though, is that after so many years of tumult—bickering, name calling, fighting that sometimes turned violent—my siblings and I seem to like each other now. It’s both a testament to the resilient nature of sibling relationships, and a small consolation for parents grief-stricken by their children’s inability to get along.

And it may be more common than you’d expect. Studies have found that pairs of siblings aged 3-7 engage in more than 2.5 conflicts on average during a 45-minute play session, which works out to one every 17 minutes. For children 2-4 years of age, hostilities can break out 6.3 times per hour, or every 9.5 minutes. Interestingly enough, the most common catalyst for conflict is property, and studies as far back as 1980 have consistently found fights between siblings to be the most common type of family violence, writes Kluger.

Interested in the lingering effects of childhood battles, psychologist Victoria Bedford studied adult siblings over a 22-year period and found that of the 75 percent who fought “somewhat frequently” to “extremely frequently” as children, 87 percent said that once they grew up, arguments with the same siblings occurred “hardly ever or not at all.” Obviously, not living in the same house anymore seems like an important factor here.

“Having siblings and not making the most of those bonds is, I believe, folly of the first order,” says Kluger. “If relationships are broken and are fixable, fix them. If they work, make them even better. Failing to do so is a little like having a thousand acres of fertile farmland and never planting it. Yes, you can always get your food at the supermarket. But think what you’re allowing to lie fallow. Life is short and it’s finite, and it plays for keeps. Siblings may be among the richest harvests of the time we have here.”

As resilient and powerful as the sibling bond may be, it’s not indestructible, writes Kluger. Barring unforgivable abuses, though, for adult siblings who have drifted away from each other, whether in apathy or estrangement—and I know of many—reconciliation is always a possibility.

Managing Editor at Good Times Newspaper |

The former managing editor at Good Times, Maria Grusauskas contributes to the column Wellness, and also gravitates toward stories about earth science. She won a CNPA award for environmental reporting in 2015. Her interests include photography, traveling, human consciousness, music, and gardening. Her work has also appeared in Astronomy magazine, High Times magazine, Los Gatos magazine and on

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