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Close Social Relationships20256 min read

The Childhood Roots of Adult Friendships

Childhood predictors of social support and intimate friends in a Cross-National analysis of the global flourishing study

Notable finding

Feeling like an outsider in your family as a child showed the strongest negative link to adult social support, about 0.52 points lower on the 0-10 scale.

By
Ritchie-Dunham, James L. et al.
Participants
202,898
Countries
22
Journal
Scientific Reports
DOI
10.1038/s41598-025-09953-5
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§1

Key Takeaways

01

Across 22 countries, positive childhood relationships with both mother and father, good childhood health, and regular religious service attendance were associated with higher levels of adult close social connections, while feeling like an outsider in the family, very difficult family financial status, and experienced abuse were associated with lower levels.

02

The strength of associations between childhood predictors and adult close social connections varied substantially across countries, suggesting that cultural values, societal structures, and national contexts shape how early experiences influence adult relationships.

03

Associations between childhood factors and adult social support were generally more robust to potential unmeasured confounding than associations with having an intimate friend, with maternal relationship showing the strongest and most robust association among the predictors studied.

§2

Why It Matters

To combat the global crisis of loneliness, we must invest in creating stable and nurturing environments for children.

About one in five adults worldwide lacks someone they can count on in times of trouble. This research points to specific childhood experiences that may help explain why — and suggests that interventions early in life could make a real difference. The findings highlight that strengthening parent-child relationships, reducing financial hardship in families, and making sure no child feels like an outsider in their own home are universal priorities that cross cultural boundaries. At the same time, the large differences between countries mean that one-size-fits-all policies will not work. A program that helps in Sweden might look very different from one that helps in Tanzania or Japan. For policymakers, educators, and mental health professionals, this study offers a roadmap: invest in childhood family relationships and basic financial security, but tailor the approach to each cultural context. The fact that feeling excluded in the family had such a powerful negative connection to adult social support — even more than abuse in some analyses — underscores how deeply belonging matters to human development.

About one in five adults worldwide lacks someone they can count on in times of trouble. This research points to specific childhood experiences that may help explain why — and suggests that interventions early in life could make a real difference. The findings highlight that strengthening parent-child relationships, reducing financial hardship in families, and making sure no child feels like an outsider in their own home are universal priorities that cross cultural boundaries. At the same time, the large differences between countries mean that one-size-fits-all policies will not work. A program that helps in Sweden might look very different from one that helps in Tanzania or Japan. For policymakers, educators, and mental health professionals, this study offers a roadmap: invest in childhood family relationships and basic financial security, but tailor the approach to each cultural context. The fact that feeling excluded in the family had such a powerful negative connection to adult social support — even more than abuse in some analyses — underscores how deeply belonging matters to human development.

To combat the global crisis of loneliness, we must invest in creating stable and nurturing environments for children.

§3

The Story

Think about the people you can truly count on — the friend you confide in, the relatives who show up when life gets hard. Where did those connections come from? This study asked over 200,000 adults across 22 countries to look back at their childhood and share what they experienced growing up.

Our ability to form deep, supportive bonds as adults is a capacity built or hindered by the world we grow up in.

The researchers wanted to know: what early life factors are connected to having close social connections as an adult? What they found is both surprising and deeply human. Having a good relationship with your mother as a child had the strongest positive connection to adult social support — people who felt close to their mom reported higher support later in life. Good relationships with fathers, excellent childhood health, attending religious services, and growing up in a financially comfortable family also tended to go hand in hand with stronger adult connections.

On the flip side, feeling like an outsider in your own family had the strongest negative connection — even stronger than experiencing abuse. Growing up in a very difficult financial situation and having parents who were divorced or never married also tended to mean less social support later on. But here is what makes this study fascinating: the strength of these connections varied a lot depending on where people lived. In some countries, a good maternal relationship was a powerful predictor of adult connections; in others, it barely mattered or even went the other direction. This tells us that while some childhood experiences seem to matter everywhere, culture plays a huge role in shaping how those early years echo into adulthood.

Figure
-0.52 points
Outsider Effect on Social Support

Feeling like an outsider in one's family during childhood was associated with a 0.52-point decrease on the 0-10 adult social support scale.

Figure
1.05x
Maternal Relationship and Intimate Friendship

Respondents who had a very good or somewhat good relationship with their mother in childhood were 1.05 times more likely to report having an intimate friend in adulthood compared to those with a very bad or somewhat bad relationship.

Figure
84%
Baseline Intimate Friendship Rate

Across the 22-country sample, 84% of respondents reported having an intimate friend they could confide in, while the mean social support score was 7.41 out of 10.

Figure
1.62
Robustness of Maternal Relationship Effect

To explain away the association between a good maternal relationship in childhood and adult social support, an unmeasured confounder would need a risk ratio of at least 1.62 with both the predictor and the outcome, above and beyond all measured covariates.

Figures
-0.52 points
Outsider Effect on Social Support

Feeling like an outsider in one's family during childhood was associated with a 0.52-point decrease on the 0-10 adult social support scale.

1.05x
Maternal Relationship and Intimate Friendship

Respondents who had a very good or somewhat good relationship with their mother in childhood were 1.05 times more likely to report having an intimate friend in adulthood compared to those with a very bad or somewhat bad relationship.

84%
Baseline Intimate Friendship Rate

Across the 22-country sample, 84% of respondents reported having an intimate friend they could confide in, while the mean social support score was 7.41 out of 10.

1.62
Robustness of Maternal Relationship Effect

To explain away the association between a good maternal relationship in childhood and adult social support, an unmeasured confounder would need a risk ratio of at least 1.62 with both the predictor and the outcome, above and beyond all measured covariates.

§4

Reader Questions

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Research Details
& Citation

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Published
2025
Journal
Scientific Reports
Participants
202,898
Countries
22
Cite this paper
Ritchie-Dunham, J. L., Yancey, G., Managi, S., Bartel, C., Bonhag, R., Padgett, R. N., Shiba, K., Johnson, B. R., & VanderWeele, T. J. (2025). Childhood predictors of social support and intimate friends in a Cross-National analysis of the global flourishing study. Scientific Reports, 15(1). https://doi.org/10.1038/s41598-025-09953-5
Tags
social-supportintimate-friendchildhoodrelationship-qualitylonelinesscross-cultural
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