What Is Affective Polarization — And Do You Have It?

In 1960, when asked whether they'd be upset if their child married someone from the opposing political party, fewer than 5% of Americans said yes. By 2020, that number had risen to over 40%.

This isn't about policy disagreement getting worse. It's something different — and arguably more dangerous. Researchers call it affective polarization: the tendency to dislike, distrust, and dehumanize people based on their political affiliation, regardless of their actual views.

The difference between ideological and affective polarization

Ideological polarization is when people's policy positions move further apart. Democrats become more progressive, Republicans become more conservative.

Affective polarization is when people's feelings toward the other side become more negative — even when their policy positions haven't changed much.

Here's the surprising part: research shows that ideological polarization in America has increased only modestly since the 1990s. On many issues, the average Democrat and average Republican aren't as far apart as you'd think. But affective polarization has skyrocketed.

In other words: we don't disagree much more than we used to. We just hate each other more.

Why affective polarization is growing

Several forces are driving this:

Political identity has become a mega-identity. Political scientist Lilliana Mason's research shows that party affiliation now correlates with race, religion, geography, education, and media consumption in ways it didn't 40 years ago. When your political party is also your cultural tribe, disagreement feels like an attack on everything you are.

Media incentives reward outrage. Both traditional and social media have discovered that content featuring political opponents behaving badly drives more engagement than content about policy. You're far more likely to see a clip of the worst person on the other side than a thoughtful representative.

Social sorting. Americans increasingly live near, work with, and socialize with people who share their political views. When you don't personally know anyone from the other side, it's easy to believe caricatures.

The real-world damage

Affective polarization isn't just an attitude problem. It has concrete consequences:

It makes governance impossible. When voters reward politicians for opposing the other side rather than solving problems, compromise becomes politically suicidal.

It destroys relationships. Millions of Americans have lost friendships, strained family bonds, or ended romantic relationships over politics — not because of irreconcilable policy differences, but because of the contempt that affective polarization breeds.

It distorts your thinking. When you view the other side as bad people rather than wrong people, you stop evaluating their arguments on merit. You reject ideas based on who said them, not what was said. This makes you worse at understanding reality.

How to tell if you have it

Ask yourself honestly:

- When you learn someone voted for the opposing party, does your opinion of them drop — before you know anything else about them? - Do you assume the worst motives about politicians on the other side, even when a more charitable interpretation is available? - Would you be uncomfortable if a close friend or family member started dating someone with opposing political views? - Do you feel a sense of satisfaction when the other party experiences a political setback, even if it doesn't benefit your side?

If you answered yes to two or more, you're experiencing meaningful affective polarization. You're not unusual — most Americans are. But awareness is the first step toward managing it.

Measure it precisely

Common Ground includes an animosity index that measures your level of cross-aisle hostility based on your reactions to real scenarios — not just self-reported attitudes. Because what people say about their tolerance and how they actually respond to disagreement are often very different things.