Last week at the grocery store, I watched a woman about my age get into a heated discussion with her friends about which brand of olive oil was “the right one.” They were quoting their favorite cooking show host like scripture.

The woman finally threw up her hands and said, “Fine, if you all think it’s better, I’ll get it.” Something about that moment stuck with me—not the olive oil debate itself, but how quickly she abandoned her own preference just to keep the peace.

It reminded me of something I’ve been thinking about lately: how many of us, especially as we get older, stop trusting our own judgment and start defaulting to what everyone else thinks. We outsource our opinions to our book clubs, our social circles, our favorite news channels. And while there’s nothing wrong with considering other perspectives, there’s something vital that gets lost when we stop doing our own thinking.

The quiet rebellion of thinking for yourself

I spent over three decades in HR, and if there’s one thing I learned, it’s that the most interesting people in any organization were rarely the ones who went along with every trend or initiative just because everyone else did. They were the ones who’d politely ask, “But why are we doing it this way?” They weren’t troublemakers—they were independent thinkers.

Benjamin A. Jacob, an author who studies aging, puts it beautifully: “Resilience in later life is a dynamic and multifactorial process, not a fixed trait.” What strikes me about this is the word “dynamic”—it suggests that mental resilience isn’t something you either have or don’t have. It’s something you actively maintain through the choices you make every day, including the choice to think for yourself.

The research backs this up in fascinating ways. The Religious Orders Study found that older adults who engage in cognitive exercises, such as social activities and learning new skills, exhibit better brain health and a reduced risk of dementia. But here’s what’s interesting—it’s not just about keeping busy. It’s about genuine engagement, the kind that happens when you’re wrestling with ideas rather than just accepting them.

When agreement becomes autopilot

I’ll be honest—there was a long stretch in my life where I was the queen of going along to get along. In my forties and early fifties, I’d nod along at dinner parties, agree with whatever the consensus was about politics, parenting, even which movies were worth watching. It wasn’t that I didn’t have opinions; I just got tired of defending them.

Then something shifted. I read a book that challenged my entire approach to relationships and boundaries, and suddenly I realized how much mental energy I’d been wasting by not thinking things through for myself. It was exhausting being agreeable all the time, constantly monitoring what others thought before forming my own opinions.

The irony is that when I started speaking up—really sharing what I thought instead of what I thought people wanted to hear—my relationships actually got stronger. Sure, I lost a few acquaintances who preferred the nodding version of me, but the friendships that remained became richer, more honest, more real.

The cost of cognitive conformity

Here’s what worries me about our tendency to outsource our thinking: we’re not just giving up our opinions, we’re giving up the mental exercise that keeps our minds sharp. Every time we default to what our group thinks without questioning it, we’re choosing the cognitive equivalent of taking the elevator instead of the stairs.

I see this happening everywhere. Friends who used to have fascinating, nuanced views on things now just repeat whatever their preferred news source told them that morning. People who used to love debating ideas now get uncomfortable if anyone disagrees with the group consensus. We’re becoming intellectually lazy, and we’re calling it harmony.

But harmony and conformity aren’t the same thing. Real harmony comes from different notes working together, not from everyone singing the exact same tune.

Building your own mental gymnasium

So how do we maintain this independent thinking as we age? From what I’ve observed—both in myself and in the sharpest octogenarians I know—it’s about creating habits that force you to engage rather than default.

I started small. Instead of immediately agreeing when someone makes a statement about something I haven’t thought through, I’ve learned to say, “That’s interesting. Let me think about that.” It buys me time to actually consider whether I agree or not.

I’ve also made a point of seeking out perspectives that challenge my assumptions. Not in an argumentative way, but with genuine curiosity. When someone sees things differently than I do, I try to understand why rather than immediately deciding they’re wrong.

Reading widely helps too. Not just things that confirm what I already believe, but books and articles that make me uncomfortable, that force me to examine my own biases. After decades of reading the same types of authors, I’ve started exploring completely different genres and perspectives. It’s like CrossFit for the brain.

The surprising social benefits

Here’s what nobody tells you about being an independent thinker as you age: it actually makes you more interesting to be around. When you stop being predictable, when you surprise people with unexpected viewpoints or questions, conversations become more engaging.

I’ve noticed this at gatherings. The people who everyone wants to talk to aren’t the ones who agree with everything—they’re the ones who bring fresh perspectives, who ask questions nobody else thought to ask, who can discuss an issue from multiple angles because they’ve actually thought it through.

Making new friends after sixty-five has taught me that authentic connection requires the same vulnerability it did when we were teenagers—the willingness to be ourselves even when it might not be popular. The difference is, at this age, we should know better than to sacrifice our individuality for acceptance.

A different kind of legacy

When I think about the kind of mind I want to have in my eighties, it’s not just about remembering names or staying organized. It’s about maintaining the ability to see things clearly, to form my own opinions, to engage with ideas rather than just receiving them.

This isn’t about being contrarian or difficult. It’s about honoring the lifetime of experiences and wisdom we’ve accumulated by actually using it to think things through. Every time we default to group think, we’re essentially saying that our own judgment—built over decades of living, learning, and observing—isn’t worth consulting.

The most mentally resilient people I know in their seventies and eighties aren’t necessarily the most educated or the most successful. They’re the ones who never stopped questioning, never stopped thinking, never stopped trusting their own ability to reason through things. They might change their minds when presented with compelling evidence, but they don’t change their minds just because everyone else has.

Your mind is the one thing that’s been with you through every experience, every lesson, every moment of your life. It deserves your trust. More importantly, it deserves to be used—really used—not just set on autopilot while you adopt whatever position seems safest or most popular. That’s not wisdom; it’s retirement of the worst kind. The kind where you’re still breathing but you’ve stopped thinking.