Why Are U.S. Politics So Divisive?

Why are U.S. politics so divisive? That’s the question Crash Course recently asked and answered in a new series called Big Questions on U.S. Government, hosted by Kousha Navidar. Here I’d like to share a visual summary of that episode.

It Wasn’t Always This Way

Let’s start with a graph that represents our current polarized political culture.

It didn’t used to be the case that all Democrats were liberal and all Republicans were conservative. In fact, in the post–Civil War Reconstruction era, it was liberal Republicans who led the charge to expand voting and civil rights for Black Americans, and it was conservative Southern Democrats who implemented Jim Crow laws.

What we’ve seen in recent decades, though, is a self-perpetuating cycle of polarization that’s causing an ever-widening gap between liberals and conservatives, Democrats and Republicans. So let’s explore some of the factors that have contributed to that polarization.

Ideological Sorting

You’ve likely noticed that it’s easier to guess someone’s party based on their stance on a single issue, like what they think about taxes, gun control, abortion, or the environment.

That represents a more stringent ideological sorting: the process by which people align their party identity with a liberal or conservative ideology.

Social Sorting

There’s also sorting happening on a social level:

  • Women lean slightly Democrat, and men lean slightly Republican.
  • Black Americans lean heavily Democrat, and white Americans lean Republican.
  • Urban Americans lean Democrat, while rural Americans lean Republican.

That social sorting is the process by which certain identities have become increasingly tied to one party over another.

From Political Identity to Mega Identity

Together, ideological sorting and social sorting have supported a shift from an individual having a political identity to having a more all-encompassing mega identity, where your political affiliation is the one identity that rules all others.

That shift impacts how you see and interact with people who identify the other way. Instead of seeing others as three-dimensional human beings, our perspective reduces them to two dimensions, if not one.

Affective Polarization and Negative Partisanship

Taken to its extreme, this polarization leads to distrust, animosity, and contempt, which goes by the term affective polarization.

That view of the other side often results in us voting against someone instead of voting for someone, with less and less attention paid to a given candidate’s specific platform. This negative partisanship has become an increasingly powerful force in both national and local politics.

A black-and-white hand-drawn visual summary of the Crash Course episode “Why Are U.S. Politics So Divisive?” with Kousha Navidar. At the bottom is a graph with a horizontal axis labeled liberal, moderate, and conservative, and a vertical axis shown as stacks of people. Two humps rise on either side: one labeled “D” with a donkey, the other “R” with an elephant. Arrows push them apart, and a spiral labeled “Polarization” swirls up from the empty middle. Dotted lines connect the spiral to four factors across the top:

Ideological sorting: pairs of stick figures facing each other across a money bag, a handgun, a pregnancy test, and a row of trees, representing taxes, gun control, abortion, and the environment.
Social sorting: pie charts showing how women, men, Black, white, urban, and rural Americans split between Democrats and Republicans.
Affective polarization: a figure moving from “political identity” to a glowing “mega identity,” then to a figure seen as 3D, 2D, and 1D, labeled “distrust, animosity, contempt.”
Negative partisanship: the words “voting against someone instead of voting for someone” above a yard sign reading “Lock her up!”

Footer: “Sketch & video by Doug Neill · www.verbaltovisual.com.”

Not the End of the Story

Even though all of this has made it harder and harder to find common ground, Navidar reminds us that we have weathered challenges before, and that this is not the end of the story.

It’s a story Crash Course will continue to explore throughout this series, and one I plan to keep sketching out. I enjoy Crash Course as a source, and I’m looking forward to seeing where they take this series and sharing what I learn with you. So stay tuned!


Want to learn how to take visual notes like the ones you see here? Check out these resources.