Childhood Trauma Beyond Caregivers: Siblings, Peers, and Communities.

Family Dynamics & Boundaries • September 15, 2024

When the Wound Didn’t Come From a Parent

She is forty-one years old, sitting in her car outside a family dinner she can’t make herself walk into. Her brother’s truck is in the driveway — the same truck she’s watched for thirty years as a signal: is he in a good mood tonight, or is tonight a night to disappear into the walls?

She has a good therapist. She’s done real work. She understands her parents — their limitations, the ways love and dysfunction coexist in the same household. What she can’t quite hold is this: her parents were fine. Not perfect, but fine. The terror she learned to live with came from the boy down the hall. Her older brother, who didn’t need to raise his voice to make her feel like she was nothing. Who could end her with a look across the dinner table.

Nobody named it. Not then. Not ever. So she spent decades filing it under “sibling stuff” — too small, too ordinary, too much a part of childhood to be worth examining. She became the woman who handles everything. The one who reads every room the moment she enters it. The one who can predict a shift in someone’s mood three beats before it happens, because she had to.

If any part of this lands for you, I want you to keep reading. Because there’s a real, clinically significant conversation to be had about childhood trauma that doesn’t begin and end with what parents did or didn’t do — and it’s a conversation that is long overdue.

What Is Childhood Trauma Beyond Caregivers?

The dominant cultural narrative around childhood trauma places parents at the center — and for good reason. Attachment research has spent decades rightly emphasizing how early caregiver relationships shape the developing nervous system. But that framing has a cost: it leaves out everyone else who had power over you as a child.

Siblings, older cousins, peers, teachers, coaches, clergy, youth group leaders, school cultures, religious institutions — all of these can be, and frequently are, sources of significant psychological harm. And when parents either don’t notice or choose not to intervene, the harm is compounded: abandonment layered on top of the original wound.

My own working definition: relational trauma is the psychological injury that results over time within a power-imbalanced relationship — whether between a child and caregiver, a child and sibling, or a child and the broader systems they inhabit — producing complex, lingering biopsychosocial effects for the person who endured it.

The key word is power. Trauma doesn’t require a parent. It requires a power differential, repetition, and the absence of a safe person to turn to. Which means your older brother who terrorized you qualifies. The church community that shamed you qualifies. The teacher who singled you out qualifies. The peer group that systematically excluded you qualifies.

The Science: What Research Tells Us

The clinical research supports this expanded view — and has for decades, even if it hasn’t always filtered into how we talk about trauma in everyday conversation.

Bessel van der Kolk, MD, psychiatrist and trauma researcher at Boston University, has long argued that trauma is fundamentally about the body’s response to overwhelm — not the specific identity of the person who caused it. In The Body Keeps the Score, van der Kolk makes clear that what matters clinically isn’t the category of perpetrator, but the degree to which the nervous system was overwhelmed and the degree to which the child’s environment failed to provide repair. A child humiliated daily by a sibling while parents look away is, neurobiologically, having a traumatic experience — regardless of whether a DSM checklist would code it as such.

Judith Herman, MD, psychiatrist and trauma researcher at Harvard Medical School, introduced the concept of complex trauma specifically to capture experiences that are relational, repeated, and occurring within systems of captivity or dependency. Herman’s framework includes families, but maps cleanly onto other structures of childhood captivity: schools you’re legally required to attend, religious communities your family belongs to, sibling hierarchies you can’t escape. The hallmark of complex trauma, in Herman’s formulation, is precisely the absence of escape — and children rarely have that option no matter where the harm is coming from.

Urie Bronfenbrenner, PhD, developmental psychologist at Cornell University, offers perhaps the most useful structural lens. His bioecological model holds that children don’t develop in isolation — they’re embedded in nested systems, from the immediate family outward to peer groups, schools, neighborhoods, and cultural institutions. Every one of those systems can support or harm development. Bronfenbrenner’s model makes explicit what clinical experience confirms: healthy development depends not just on good caregivers but on a safe ecology. When the sibling subsystem is toxic, when school is a site of chronic fear, when the religious community enforces shame — the developmental damage is real, even if the parents are loving people doing their best.

The research on sibling abuse alone is striking. Studies consistently find that sibling victimization is more prevalent than peer bullying and parent-to-child abuse combined — yet receives a fraction of the clinical and cultural attention. Children who experience chronic sibling abuse show elevated rates of depression, anxiety, low self-worth, and interpersonal difficulties well into adulthood. The wound is real. It just doesn’t have a name most people recognize.

How This Shows Up in Driven Women

Sarah is a thirty-eight-year-old operations director at a growing tech company. She’s built a career on her ability to anticipate problems before they surface, manage conflict without flinching, and stay calm in situations that destabilize everyone around her. Her colleagues admire her. Her direct reports trust her. Her boss calls her the most capable person on his team.

She comes to therapy because she can’t stop working. Not in the productive sense — in the compulsive sense. The moment her calendar clears, something close to panic sets in. She fills every gap. She doesn’t know how to rest. She’s ended three relationships in ten years when they started to feel “too close.” Her most recent partner told her she always feels like she’s watching for the exit.

When we start working on her history, she talks about her parents in measured, balanced terms. They were inconsistent, she says. Emotionally unavailable sometimes. But not abusive. Not really. What she takes longer to get to — what she circles for weeks — is her older brother. Six years older. The one who decided, for reasons she still doesn’t fully understand, that she was his primary target.

He didn’t hit her often. He didn’t have to. He was a master of quiet cruelty: the comment at dinner designed to make her feel stupid in front of her parents, the smirk that told her he’d be waiting when they got home, the way he could rearrange the air in a room the moment he walked in. Her parents thought he was just “hard on her.” Boys will be boys. She’d toughen up.

She didn’t toughen up, exactly. She became hypervigilant. She learned to read every room for danger. She learned that intimacy was where people hurt you. She learned that the safest thing she could do was become so indispensable, so competent, so useful that no one would have reason to come for her.

This is what childhood trauma beyond caregivers looks like in the body of a driven woman. It doesn’t look like obvious dysfunction. It looks like extraordinary competence organized around an ancient fear. It looks like a woman who built an entire life on her ability to manage the unpredictable — because once, she had to.

“For there is many a small betrayal in the mind,
a shrug that lets the fragile sequence break
sending with shouts the horrible errors of childhood
storming out to play through the broken dike.

And as elephants parade holding each elephant’s tail,
but if one wanders the circus won’t find the park,
I call it cruel and maybe the root of all cruelty
to know what occurs but not recognize the fact.

And so I appeal to a voice, to something shadowy,
a remote important region in all who talk:
though we could fool each other, we should consider —
lest the parade of our mutual life get lost in the dark.

For it is important that awake people be awake,
or a breaking line may discourage them back to sleep;
the signals we give — yes or no, or maybe —
should be clear: the darkness around us is deep.”

— William Stafford, “A Ritual to Read to Each Other”

The Both/And of Sibling and Community Trauma

One of the most important things I want to say here, clearly and directly: acknowledging trauma from siblings or community systems doesn’t mean your parents were terrible people. This is where the both/and becomes essential.

It’s possible that your parents loved you sincerely and failed to protect you from your sibling. It’s possible that your faith community gave you genuine belonging and meaning and also caused you real harm. It’s possible that your school was full of teachers who cared about you and the culture allowed bullying to flourish unchallenged. Both things can be true.

Most people who carry wounds from siblings or community systems spend years unconsciously protecting someone — usually the parents who didn’t intervene, sometimes the institution itself. There’s something almost comforting about deciding it wasn’t that bad, that you’re making too much of it, that everyone had a difficult older sibling. That story is easier than sitting with the reality that you were harmed in your own home and the people supposed to protect you either didn’t see it or didn’t act.

The both/and isn’t about assigning blame. It’s about accuracy. When we’re accurate about what happened and who failed to show up, we stop performing emotional gymnastics to make sense of why we are the way we are. We stop explaining away the hypervigilance, the difficulty with trust, the way our body tenses when someone’s tone shifts unexpectedly. Those responses make perfect sense when we’re willing to hold the full story.

Sibling trauma carries a specific quality of invisibility. Siblings are supposed to fight. Siblings are supposed to be rough on each other. This framing — which is not wrong, exactly, but deeply incomplete — means that years of systematic emotional cruelty get filed under “normal sibling rivalry” and never examined. The child doesn’t develop language for it. The adult doesn’t either. And the wound stays unnamed, which means it stays unhealed.

Community trauma has its own distinct texture. When the harm comes from a church, a school, a sports team, or a peer group, there’s often institutional weight behind it — the authority of the organization, the community’s collective agreement that this is how things are done here, the implicit or explicit message that speaking up will cost you belonging. For many children, belonging to the institution is survival — socially, spiritually, sometimes economically. Which means they can’t afford to name what’s happening even when it’s causing clear harm.

The Systemic Lens: Why We Only Talk About Parent Trauma

It’s worth asking why the conversation about childhood trauma has remained so narrowly focused on caregivers, even as clinicians and researchers have long recognized the broader landscape.

Part of the answer is historical. The first wave of serious clinical work on childhood trauma — attachment theory, early developmental psychology, the DSM’s incorporation of PTSD — rightly centered on the most foundational relationship: the caregiver. That work is foundational. It doesn’t need to be dismantled. It needs to be built upon.

Part of the answer is cultural. Western psychological frameworks have historically centered the nuclear family as the primary unit of development and dysfunction. Urie Bronfenbrenner, PhD, developmental psychologist at Cornell University, challenged this explicitly — arguing that development is ecological, not just familial. But ecological thinking is complex, harder to operationalize, and less compatible with a therapeutic model that focuses on the individual in a room with a therapist. So the broader systemic view has been slower to take hold in practice, even as it’s been theoretically available for decades.

Part of the answer is institutional self-protection. Schools, churches, and other community organizations have strong incentives to resist the framing of themselves as potential sources of childhood trauma. When a child is harmed in a family, the institution doesn’t bear responsibility. When a child is harmed in an institution, the calculus changes entirely. The resistance to naming community-based childhood trauma isn’t accidental. It’s structural.

And part of the answer is the way trauma itself resists naming when it comes from a source that isn’t on the official list. If you’ve internalized the message that childhood trauma means parental abuse or neglect, then the thing your older brother did — the years of it, the way it reorganized your nervous system — doesn’t have a name. And things without names are almost impossible to heal. You can’t treat what you can’t see.

This is why I’ve developed a more inclusive working definition of relational trauma. Not to erase the importance of caregiver relationships, but to ensure that the full ecology of a child’s experience is visible — and therefore healable.

How to Heal: Beginning the Process

Priya comes to our first session already apologizing. She’s sorry she’s even here, she says. It wasn’t that bad. She had two loving parents. Her grandmother was wonderful. It’s just — she’s been having panic attacks at work, and her doctor suggested she talk to someone.

Over the next few months, what emerges is a story about a peer group. A cluster of girls she’d known since second grade who, starting in middle school, made it their project to systematically exclude and humiliate her. The kind of cruelty that’s hard to name when you’re in it because nothing obvious enough to report ever happens — just a thousand tiny cuts, delivered with the precision of children who know exactly where someone’s soft spots are.

Her parents knew something was wrong. They told her to try harder to fit in. Her teachers saw some of it and did nothing. Priya spent four years learning, in her nervous system, that she was fundamentally unwanted — that there was something about her that made people want to push her out. She’s now thirty-four. She’s brilliant, warm, and deeply competent. She’s also been managing low-grade social anxiety since adolescence, avoids groups where she doesn’t know anyone, and has a pattern of over-explaining herself in professional settings — preemptively justifying her presence before anyone questions it.

Healing this kind of wound requires several things, and they build on each other.

Naming it. The first thing Priya needed — the thing that produced immediate and visible relief — was having someone use the word trauma for what had happened to her. Not because labels are magic, but because the absence of a name had kept her carrying a private, unlocated sense that something was wrong with her. Naming it moved the wound from inside her to between us, where it could be examined and worked with.

Locating the grief. Wounds from siblings and peer groups carry a particular grief distinct from caregiver trauma: grief for the childhood you didn’t get to have. The years of ordinary belonging and ease that other kids seemed to possess. The versions of yourself you couldn’t afford to be because you were too busy managing danger. That grief needs room. It tends to surface as sadness that seems disproportionate until you understand what it’s actually about.

Working with the nervous system. Bessel van der Kolk, MD, psychiatrist and trauma researcher at Boston University, is unambiguous on this point: trauma lives in the body, not just in narrative memory. Healing isn’t only a cognitive process. Priya’s panic attacks weren’t symptoms to be managed — they were communications from a nervous system that had learned, in adolescence, that groups of people were dangerous. Healing had to happen somatically as well as cognitively: breath work, titrated exposure, learning to tolerate the physiological experience of social situations without the old alarm system overriding everything.

Revising the story. The story Priya had been carrying — that she was fundamentally unwanted, that something was wrong with her — was a story her nervous system built in adolescence to make sense of what was happening. It was adaptive at the time. It isn’t accurate. Part of healing is developing enough distance from that story to examine it: Who told you this? What did they actually know? What is the evidence for and against it? This isn’t toxic positivity. It’s accuracy.

Finding reparative relationships. Judith Herman, MD, psychiatrist and trauma researcher at Harvard Medical School, writes that recovery from trauma ultimately happens in the context of relationships — that what was injured in relationship must be healed in relationship. For wounds from sibling or peer systems, this often means finding communities where belonging is genuinely safe: a therapy group, a close friendship, a team where the old dynamics don’t organize themselves around exclusion. The nervous system needs evidence that the original learning — that groups are dangerous — is no longer universally true.

None of this is quick. None of it is linear. But it is possible, and it begins with being willing to look at the full picture of where your wounds came from — not just the most socially sanctioned story about childhood trauma, but the real one.

A Final Word

If you’ve read this far and something has shifted — if a memory has surfaced, or a pattern has suddenly made more sense, or you’ve found yourself thinking about a sibling or a teacher or a community you’ve never quite let yourself examine — I want you to know that this is exactly the kind of work I do.

The driven women I work with in therapy and coaching are not broken. They are extraordinarily capable people whose competence was, in many cases, organized around very early experiences of not being safe — experiences that often didn’t come from parents, and that often don’t have names yet. Part of what we do together is build that vocabulary. Name the wound accurately. Understand how it shaped you. And then — carefully, incrementally, in the presence of real support — begin to live differently.

You don’t have to fit a narrow definition of trauma to deserve help. You don’t have to have had terrible parents. You don’t have to have a story that looks a certain way. You just have to be willing to tell the truth about what happened, to whom, and what it cost you.

That’s where it starts.

Warmly,
Annie

Medical Disclaimer