The Neuroscience Behind Polarized Political Points of View

The Reason Everything Feels More Divided

A couple of months ago, I wrote a blog about an awkward political moment I experienced at a Super Bowl party. The blog was titled We’re Not Arguing About Politics, We’re Protecting Predictions. It was fun to write about, and even more enjoyable to read the emails I got afterward. People had stories. A lot of them. Different settings, different conversations, but the same feeling. “How did that escalate so fast?

That’s when it clicked for me. Neuroscience and politics make great bedfellows. Neuroscience is about how the brain works. Political conversations are where you see the consequences of that play out.

When we get into political conversations, we usually focus on what people believe. Who’s right. Who’s wrong. Who’s more informed. Who’s too extreme.

But there’s something else happening behind the scenes. It’s not just what people believe, it’s how different those beliefs feel.

I came across a paper recently by Peter Steiglechner and his colleagues called “How opinion variation among in-groups can skew perceptions of ideological polarization,”and it put words to this in a really clear way. What they found is that when a group starts thinking more alike, they begin to see people outside the group as more different. Not because those people actually changed, but because the way the group is seeing that difference has shifted.

Looking back at that Super Bowl moment, nothing that was said was all that extreme. But it felt bigger than it should have.

That’s the part that Dr. Steiglechner helps explain.

When you’re surrounded by people who mostly think the same way, your brain adjusts to that. That becomes your “normal.” So, when someone says something even a little outside of that, it doesn’t register as “a small difference.” It feels like a huge difference.

Kind of like when I moved to Phoenix and now 65˚ feels cold. People like to say, “your blood got thinner living in the desert.” It’s a great line, but what’s really happening is my brain has recalibrated what counts as cold.

Your brain is constantly updating based on what it’s around.

If you’re used to hearing a wide range of opinions, your brain builds tolerance for that. Differences don’t feel as sharp because they’re expected. But if you’re mostly around agreement, your brain recalibrates. It starts to expect consistency and narrows the range of what feels normal.

When something outside that range pops up, it stands out more. It feels more noticeable, more important, and often more uncomfortable.

65˚ is 65˚. But coming from 110˚ it feels frigid, coming from 35˚ it feels balmy.

This is why political conversations can go sideways so quickly.

It’s not always because the ideas are that far apart. It’s because they feel far apart. And when something feels far apart, your brain assumes it’s going to take more effort to deal with.

It shifts into protection mode.

That’s when you see people getting defensive, people shutting down, and people trying to end the conversation quickly.

Because the conversation suddenly feels like more than they signed up for.

This shows up everywhere.

Work teams. Leadership groups. Friend circles. Anywhere people spend enough time together, they start to create a shared “normal.”

And a shared normal is a good thing. It helps with trust and clarity. But there’s a tradeoff. The more similar that “normal” becomes, the harder it can be to handle something that falls outside of that normal.

This can be super confusing for leaders. We work really hard to get people aligned. Shared goals, shared language, shared direction. But as alignment increases, tolerance for difference can start to decrease.

When someone brings up a new idea or a different idea, the reaction can feel bigger than the idea itself. That different idea doesn’t just feel “different.” It can feel a little awkward, uncomfortable, or even threatening. That changes how your system responds to the idea.

Instead of staying curious, asking questions, or building on the conversation, your brain may push you to shut it down, defend your position, or disengage. And that’s what makes conversations harder, even when you want them to go well.

This isn’t a reason to stop building alignment. You want a team that can move together, but also a team that doesn’t freak out when something unexpected shows up.

That means letting different perspectives surface without rushing to fix them, slowing conversations down when things feel uncomfortable, and reminding people that not everything different is a problem

This isn’t about creating disagreement. If done well, it is about helping people stay regulated when disagreement happens.

That Super Bowl situation makes a lot more sense to me now. It wasn’t just about what was said. It was about what everyone was used to hearing. And that’s true in a lot of situations that feel more intense than they should.

Sometimes the gap between people isn’t actually that large. It just feels that way because our brain has gotten used to something smaller.

A lot of what we call “division” is really just a shift in what our brain thinks is normal.

If this got you thinking and you want to understand more about what your brain is doing in moments like this, I’d love for you to keep learning.

Some of my eBooks and on-demand trainings are great to dive in a little deeper.

You can check them out here: https://neuro-la.com/training/

Its a great place to start building a better world by building better brains.