A 2026 paper called Riding Solo: The Associations Between Singlehood Self-Expansion Potential, Self-Expansion Experiences, and Singlehood Outcomes set out to test an assumption most dating culture treats as settled — that being single is a waiting room, a deficit state you endure until the actual life starts. Elina Moreno and her co-authors measured something narrower and more useful: what happens to people who believe the opposite. That singlehood itself is room to grow into. Across three studies, the belief predicted the outcome — people who saw their single status as an opening for new experiences had more of them, and reported more life satisfaction, more singlehood satisfaction, and less fear of ending up alone. Then a detail complicates the whole “single equals alone” premise the study was built to test: most of that growth wasn’t happening in solitude. It was happening with other people. Half the time, with friends. Friedrich Nietzsche made a version of this argument in 1882, in five words buried in The Gay Science: “You shall become the one you are.” He never once said you’d do it by yourself.

The Quick Verdict

Question	What we found
Who ran the study?	Elina Moreno, Yuthika U. Girme, Anastasiia Burik, and Sarah C. E. Stanton
Where and when?	Personality and Social Psychology Bulletin, published online August 6, 2026
How big was it?	Three pre-registered studies: a 14-day daily diary (130 single adults), a six-week weekly diary (146 single students), and an online experiment (324 single adults, ages 18-76)
What was measured?	Singlehood self-expansion potential (SSEP) — belief that being single enables growth — against self-expanding experiences, singlehood satisfaction, psychological need fulfillment, life satisfaction, and fear of being single
What was the twist?	Self-expanding activities happened mostly with friends (50%) and family (22%), not alone (18%) — self-expansion turned out to be social, not solitary
What did Nietzsche already argue?	In The Gay Science (1882), the self isn’t a fixed essence to uncover — it’s something built through deliberate, often novel experimentation: “You shall become the one you are”

The Quick Version

A 2026 study of single adults found that believing singlehood offers chances to grow — not just chances to wait for a relationship — predicts higher life satisfaction, singlehood satisfaction, and lower fear of being single. The growth itself happened mostly through friends and family, not solitude. Nietzsche said something structurally identical almost 150 years earlier: the self isn’t found by sitting still with it. It’s built by doing things you haven’t done before, with people, out in the world.

What the 2026 Study Actually Found

Moreno’s team wasn’t trying to prove singlehood is secretly better than partnership. They were testing a specific psychological mechanism they called singlehood self-expansion potential, or SSEP — the belief that being unpartnered creates real opportunities for new experiences, new perspectives, and new relationships, rather than just an absence of the one relationship that supposedly matters. Self-expansion itself is an older idea in relationship science, usually studied as something romantic partners do for each other. This paper’s contribution was asking whether singlehood could do the same job.

Three studies tested it from different angles. The first had 130 single adults, mostly Canadian university students, log their days for two weeks — 1,574 daily reports in total — tracking novel activities alongside mood and satisfaction measures. The second followed 146 single students for six weeks, checking in weekly on what growth-oriented things they’d tried and who they’d tried them with. The third moved from observation to manipulation: 324 single adults, ages 18 to 76, were randomly assigned to write about either routine, predictable activities or novel, spontaneous ones, to see whether just imagining singlehood as growth-enabling changed anything.

The pattern held across all three. People with higher SSEP — a stronger baseline belief that singlehood offered room to grow — reported more actual self-expanding experiences, higher singlehood satisfaction, stronger psychological need fulfillment (autonomy, competence, feeling connected to others), higher overall life satisfaction, and less fear of being single. In the experimental study, participants who wrote about novel activities didn’t show a measurable shift in their underlying SSEP beliefs, but they did report a modest bump in self-expansion and a real increase in positive mood compared to the routine-activity group. Believing growth is available and doing something that feels like growth aren’t identical, but pushing on either one moved the needle.

The detail that keeps this from being just another “single people are fine, actually” study is the companion data from the six-week diary. When participants logged a self-expanding activity, they also logged who it was with. Friends showed up 50% of the time. Family, 22%. Acquaintances, 7%. Strangers and romantic interests each accounted for roughly 2%. Only about 18% of the time was the activity done alone. Self-expansion, in this data, is a social behavior that happens to be available to people without a partner — not a private project undertaken in the absence of one.

Nietzsche Already Made This Argument, Without a Single Data Point

The Gay Science, published in 1882, contains one of Nietzsche’s most quoted and most consistently flattened lines. In Book III, section 270, he writes: “Was sagt dein Gewissen? — ‘Du sollst der werden, der du bist.’” What does your conscience say? — “You shall become the one you are.” He wasn’t the first to say it — the phrase adapts a line from the Greek poet Pindar — and he liked it enough to give his late memoir Ecce Homo the subtitle “How One Becomes What One Is.” Three separate times, across a decade of writing, Nietzsche circled back to the same instruction.

Read quickly, it sounds like a permission slip for self-discovery — go find the authentic you that’s been in there all along. That’s close to the opposite of what the line argues. “Become” is doing the actual work in that sentence, not “are.” Nietzsche’s self isn’t a fixed thing waiting to be excavated through enough journaling or enough stillness. It’s a thing under construction, and the construction materials are your experiences — specifically the ones you haven’t already had. Thus Spoke Zarathustra, written the following year, develops this into his account of self-overcoming: the self as something you keep exceeding, not something you keep confirming. A person who only ever repeats familiar days isn’t protecting their identity. They’re failing to build one.

That’s what makes this a genuinely different claim than ordinary advice to “try new things.” Nietzsche’s version has stakes attached. If who you are is constituted by what you do and encounter, then a life without novelty isn’t a life that’s merely a little dull — it’s a self that has stopped forming. The 2026 study’s core mechanism, SSEP, is a psychologized version of exactly this: not “single people should have more fun,” but a measurable belief that novel experience is how a person grows, tracked against real outcomes in real single adults’ lives. Nietzsche didn’t have singlehood specifically in mind. He was writing about the human situation generally, in a period when he had little interest in marriage as an organizing life event. But the mechanism he’s describing — identity as an ongoing act of self-creation through experimentation, not a static fact awaiting discovery — is the same mechanism the study measured a century and a half later with a survey instrument and a diary app.

What Did Nietzsche Actually Mean by “Become Who You Are”?

1. The self isn’t fixed — it’s under construction. Nietzsche’s target is the assumption that you have a true, stable self sitting somewhere inside you, waiting to be discovered through enough reflection. He argues the opposite: who you are is actively built, not found.
2. Experience is the building material. “Become” implies action and encounter, not introspection alone. Zarathustra’s account of self-overcoming treats new experience — including discomfort and risk — as the substance a self is made from.
3. The phrase is borrowed, and Nietzsche knew it. He adapted the line from the poet Pindar and later reused it as the subtitle of Ecce Homo, “How One Becomes What One Is” — a sign he saw self-creation as a lifelong project, not a one-time realization.
4. It’s addressed to conscience, not comfort. In the original passage, the instruction comes as an answer to “what does your conscience say” — for Nietzsche, becoming who you are is a demand, not a suggestion you can indefinitely postpone.

This Site Has Covered Nietzsche and Solitude Before — Here’s the Difference

An earlier post here used Nietzsche’s eternal recurrence as a filter for daily decisions — would you choose to live this exact moment again, forever? That piece was about evaluating a life you’ve already built, moment by moment. This one is about the mechanism that builds it in the first place. Eternal recurrence asks you to judge the self you already are. “Become who you are” is the argument for why that self needed novel experience to exist as anything worth judging.

This site’s post on solitude and loneliness draws a careful line between chosen aloneness and isolation, arguing that solitude, practiced well, predicts flourishing. The 2026 study doesn’t contradict that — but it does complicate the reflexive assumption that a single person’s growth happens because they’re alone more. In this data, the growth was overwhelmingly social. Friends did more of that work than solitude did, by a wide margin.

That social finding also connects to this site’s earlier piece on Epicurus and friendship, which argued that Epicurus ranked friendship above nearly everything else in a well-lived life. The 2026 data gives that ranking an unexpected update: friendship isn’t just a source of comfort or belonging. For single people specifically, it’s turning out to be the primary delivery mechanism for the kind of novel experience that predicts psychological growth. And the site’s post on Montaigne argued that self-knowledge is a practice of ongoing noticing, never a finished project — a claim that sits comfortably next to Nietzsche’s, even though the two philosophers get there by very different roads. Montaigne says you never finish noticing yourself. Nietzsche says there’s a self worth noticing only because you keep building it.

Where This Doesn’t Hold Up

None of this makes Nietzsche a psychologist, and the honest version of this piece says so directly.

The diary studies are correlational and skew heavily toward young, Canadian university students — a specific slice of single adulthood, not a representative one. Believing singlehood offers growth potential and actually experiencing more growth move together in this data, but the design can’t fully separate cause from effect. People who are already thriving may simply be more inclined to endorse an optimistic belief about their situation, whichever direction the arrow actually runs. The experimental study is the strongest piece for causality — random assignment to imagine novel versus routine activities — but even there, the effect on SSEP itself was null. Only mood and self-expansion moved. That’s a real finding, not the strongest possible version of one.

There’s also a real tension in the Nietzsche comparison worth naming rather than smoothing over. Nietzsche was deeply suspicious of the crowd — what he elsewhere calls “the herd” — and much of his account of self-overcoming reads as a solitary, even adversarial project, the individual pulling away from convention to become something singular. The 2026 study’s biggest finding cuts the other way: the growth that predicted better outcomes happened mostly with other people, friends most of all. That’s not a fatal problem for the comparison — Nietzsche never argued that becoming yourself required a hermitage, and Zarathustra himself comes down from the mountain to be around people repeatedly. But it’s a real seam, not a perfect fit, and pretending otherwise would be dishonest about what the philosophy actually says versus what the data actually found.

It’s also worth saying plainly: this isn’t a study claiming singlehood is superior to partnership, and neither the researchers nor Nietzsche make that argument. The finding is narrower and more useful than that — that how you interpret your current relationship status shapes what you do with it, and that interpretation is at least partly a choice.

A Practice Worth Trying

Neither Moreno’s team nor Nietzsche wrote this as a five-step plan, but the shared shape of what they found points somewhere specific.

1. Treat singlehood as a season with content, not a waiting room. The belief itself moved outcomes in this study, independent of circumstances changing. What you tell yourself your situation is for shapes what you do with it.
2. Default to a friend, not solitude, when you want to try something new. The data is specific here — half of all self-expanding activities happened with friends. If there’s a class, a trip, or an unfamiliar restaurant you’ve been meaning to try, the highest-odds version of that plan includes someone else.
3. Pick genuine novelty over comfortable repetition. The experimental study’s effect came from imagining spontaneous, unfamiliar activities specifically — not more of what you already do reliably enjoy. Nietzsche’s version of the same instruction: repetition confirms a self you already have. Only the unfamiliar builds one.
4. Notice the difference between belief and mood. The study found that imagining novelty shifted mood and reported growth without shifting the underlying belief about singlehood’s potential. Don’t wait to feel fully convinced before trying something. The evidence suggests the doing moves things the believing alone won’t.

The Becoming Was the Point

Moreno and her co-authors weren’t testing Nietzsche. They were asking a narrower, more measurable question — does believing singlehood offers room to grow actually predict anything real about a person’s life — and they found something sharper than “being single is fine”: a specific belief that tracks with more novel experience, more satisfaction, less fear, and growth that turns out to run mostly through friends and family rather than solitary reinvention. Nietzsche wasn’t running diary studies. He was working out, from a single line buried in a book about gay science, why a self that only repeats itself has stopped becoming anything at all — and he borrowed the phrase from a poet dead two thousand years before he wrote it, because the insight wasn’t new even when he wrote it down. Neither needed the other to be right. It’s just hard to ignore that a nineteenth-century philosopher’s five-word imperative and a 2026 psychology paper about single adults keeping diaries are describing the same unglamorous mechanism: you don’t discover who you are by sitting still with what you’ve already got. You build it, mostly with other people, by doing something you haven’t done yet.

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This post discusses a 2026 psychology study on singlehood and personal growth alongside a classical philosophical text. It isn’t a claim that singlehood is preferable to partnership, and neither the study nor Nietzsche argue that. If fear of being single or relationship anxiety is significantly affecting your wellbeing, a therapist can help in ways a philosophy essay can’t.