Hierarchical vs. non-hierarchical polyamory: attachment and relationship satisfaction study

There is a version of polyamory that runs on org charts. A primary partner gets the most time, the shared lease, the emergency contact slot. Secondary partners orbit at a determined distance. The structure is deliberate, disclosed, and — to many people who practice it — a reasonable way to manage the emotional complexity of loving more than one person at once. It feels orderly. What a pair of studies published in the Archives of Sexual Behavior^[1] found, though, is that the orderliness may come at a cost.

Researchers Sharon M. Flicker and colleagues^[1] compared relationship satisfaction and attachment security across two samples — 225 participants in the first study, 360 in the second — sorting them by whether they practiced hierarchical polyamory (relationships explicitly ranked, with a designated primary) or non-hierarchical polyamory (no relationship formally prioritized over another). The differences they found were not trivial, and they point toward something less obvious than the usual debate about whether structure helps or hurts.

What the Rankings Actually Do to Attachment

In hierarchical arrangements, secondary and tertiary partners showed measurably lower attachment security than primary partners and their equivalents in non-hierarchical configurations. That gap is not especially surprising — being formally designated as less important tends to register as exactly that. What is more interesting is what the researchers found when they looked at non-hierarchical relationships: even though differences in investment between partners still existed in those configurations, the attachment security across all partners was more similar to one another. The structure didn't eliminate real-world variation in how much time or energy a person gave to each relationship. But it did seem to affect how secure each partner felt.

The researchers suggest a mechanism worth sitting with: differences that emerge organically — because one relationship has simply been going longer, or because life circumstances naturally draw two people closer at a particular moment — may land differently than differences that are encoded by design. When a hierarchy is predetermined, a partner's lower status is a structural fact, something built into the relationship's operating rules before they've had a chance to establish anything. When differences emerge over time without a formal ranking system, they feel more like the natural texture of any relationship and less like a ceiling.

“Differences that occur organically rather than in a predetermined manner may be related to greater similarities in attachment security across partners.”

The Attachment Gap Closes — Eventually

The research also found that the attachment security gap between secondary and tertiary partners, relative to primary partners and non-hierarchical equivalents, may narrow with time. That's a meaningful qualifier. It suggests the lower security isn't necessarily permanent — that what a formal hierarchy installs as a structural condition, time and accumulated experience can partially undo. But it also raises the obvious question about what happens in the interim, during the months or years before that gap closes, and for relationships that don't survive long enough for it to.

This connects to something researchers studying attachment dynamics in polyamory have been examining from multiple angles. The concern isn't simply about fairness or hurt feelings. Attachment security — the degree to which a person feels safe, seen, and reliably responded to in a relationship — shapes how people regulate emotions, handle conflict, and show up over the long term. If attachment style functions as a kind of emotional infrastructure, then a structure that systematically produces lower security in certain partners isn't just a philosophical problem. It's a behavioral and psychological one.

The Zero-Sum Question That Isn't

One assumption that polyamory research keeps interrogating — and that this study reinforces — is the idea that need fulfillment is competitive. The intuition makes sense on the surface: if Partner A meets a lot of your needs, does that leave less for Partner B to fulfill? The data say no. Across both studies, need fulfillment was consistently high with both partners, and — crucially — the degree to which one partner met someone's needs was unrelated to satisfaction or commitment with another partner. The relationship economy, at least in these samples, doesn't appear to be zero-sum. Getting more from one person doesn't mean getting less value from the other.

That finding matters beyond polyamory. The scarcity model of emotional investment — that love, attention, and security are finite resources that must be carefully rationed — sits underneath a lot of relationship anxiety in general. When it shows up in hierarchical polyamory, it takes a specific institutional form: the explicit ranking of partners is often justified partly on the grounds that resources must be allocated, that someone has to be primary because you can't give everything to everyone. What this research suggests is that the scarcity assumption may be doing more organizational than emotional work. The ranking may be less about actual resource limits and more about managing uncertainty — giving the primary partner a formal guarantee of priority.

“The extent to which one partner met someone's needs was unrelated to satisfaction or commitment with another partner.”

Structure as a Signal, Not Just a Rule

None of this is an argument that hierarchy is always harmful or that non-hierarchical polyamory is inherently healthier. Relational structures exist in context, and what works depends heavily on the people, histories, and communication patterns involved. The research is also limited: self-selected samples in studies of polyamory tend to skew toward people who are already relatively reflective about their relationships, which may soften some of the harder edges of what hierarchy looks like in practice. There's also an ongoing conversation about whether the problems attributed to hierarchical polyamory are really problems of hierarchy per se, or problems of how people use hierarchy to avoid the harder work of genuine negotiation.

What the Flicker study does suggest is that the form a relationship takes — the explicit rules, rankings, and priority structures people build around it — acts as a signal, not just a logistics system. Being formally designated as secondary tells a partner something about their position that no amount of warmth in individual interactions can fully neutralize. The structure communicates before any conversation happens. And what it communicates shapes how securely a person can attach, which in turn shapes almost everything else about how the relationship actually functions over time.

The more useful question, then, may not be whether to have structure — all relationships have structure, whether or not it's named — but whether the structure you've built matches the experience you're actually trying to create. A hierarchy that was designed to protect one relationship may, in practice, be slowly undermining another. And the gap between what the architecture promises and what the people inside it feel is where most of the interesting — and difficult — work tends to live.