Why Do We Question Everything?

You don't question everything because you're smart. You question everything because, at some point, your nervous system learned it wasn't safe to stop.

That's an uncomfortable reframe, and it's also the one the research actually supports.

The One-Line Version

Chronic questioning and rumination in women isn't a personality trait or an intellectual virtue, it's a documented stress response rooted in structural inequality, and it's a meaningful part of why women are diagnosed with depression at roughly twice the rate of men.

What the Research Actually Shows

Around 73% of 25 to 35 year olds report chronic overthinking, according to Talkiatry and consistent figures from other sources. But the gender gap is the more interesting part. A meta-analysis by Johnson and Whisman (2013), covering 59 studies and over 14,000 participants, found women score significantly higher than men on rumination (d = 0.24), brooding (d = 0.19), and reflection (d = 0.17). Those differences show up as early as around age 12 and persist across the entire adult lifespan, according to a 2023 longitudinal study in Frontiers in Psychology that tracked nearly 65,000 people across 12 annual waves.

Response Styles Theory, developed by Susan Nolen-Hoeksema, argues that this rumination gap partially explains why women are about twice as likely as men to develop depression from adolescence onward. Importantly, the root cause the research points to isn't neurological difference, it's structural: women on average face more uncontrollable, gendered stressors, interpersonal, relational, and societal, and rumination is a predictable response to stress you can't control.

There's also a trauma-informed reading worth taking seriously. Psyclarity Health's 2025 clinical summary describes chronic overthinking as a coping mechanism that develops in response to past mistakes, trauma, or a difficult childhood, essentially an attempt to create safety by never being caught off guard again. That fits with 2024 research in Biological Psychiatry linking childhood maltreatment to increased amygdala connectivity associated with anxiety after trauma.

What This Doesn't Mean

None of this means overthinking is fixed or untreatable, or that it's biology and therefore inevitable. The structural framing is actually the more hopeful one: if the driver is largely environmental stress rather than an innate trait, the response is something that can shift as circumstances, support, and coping strategies change.

Topics Covered

• Rumination and overthinking research
• Gender differences in mental health
• Response Styles Theory
• Trauma-informed psychology
• Depression and gender disparities
• Nervous system and safety responses

Sources

• Johnson & Whisman (2013). Gender differences in rumination: A meta-analysis. Personality and Individual Differences
• Lilly et al. (2023). Thinking twice: gender differences in repetitive negative thinking across the adult lifespan. Frontiers in Psychology
• Harb et al. (2024). Childhood maltreatment and amygdala-mediated anxiety. Biological Psychiatry Global Open Science
• Nolen-Hoeksema, S. Response Styles Theory
• Psyclarity Health (2025). Understanding Chronic Overthinking as a Trauma Response

About the Channel

This piece supports an upcoming video on Piper Jacobsen's YouTube channel, which explores the psychology of being a woman: self-objectification, productivity, identity, and behaviour change. Subscribe on YouTube to catch it when it goes live.