Is political polarization worse than it's been in the past?
Whether political polarization is "worse than it has been in the past" depends on how far back into history you look.
If your point of comparison is the American Civil War (1861–1865)—during which the country physically fractured and hundreds of thousands of lives were lost—then polarization today is not at its absolute historical peak.
However, if your point of comparison is the last 100 to 130 years, the answer is yes: by almost every empirical measure, political polarization is worse today than it has been at any point in modern history.
To understand where we stand today, political scientists and historians look at polarization through three main lenses: legislative polarization (how politicians behave), affective polarization (how everyday people feel about each other), and issue sorting (how political beliefs align).
1. Legislative Polarization: At Gilded Age Levels
Political scientists measure polarization in Congress using a system called DW-NOMINATE, which maps politicians' ideologies on a scale from -1 (most liberal) to +1 (most conservative) based on their roll-call voting records.
2. Affective Polarization: Exceptional Dislike and Distrust
"Affective polarization" is not about policy differences, but about how much partisans dislike, distrust, and demonize the opposing side.
3. Issue Alignment and "Sorting"
Historically, people’s political opinions were "cross-cutting"—a voter might be conservative on economics but liberal on social issues, meaning they didn't fit neatly into one political party. Today, Americans are highly sorted.
How Today Compares to Past Eras
The Mid-20th Century: The Anomaly (1940s–1970s)
When people fondly recall an era of bipartisan compromise and political civility, they are usually remembering the mid-20th century. However, historians point out that this era was actually a historical anomaly.
During this time, the Democratic Party was a highly unstable coalition of progressive Northern liberals and deeply conservative Southern segregationists. Because both parties contained both liberals and conservatives, compromise was easy, but it came at a high cost: national political stability was largely maintained by keeping volatile issues like civil rights off the federal agenda. Once the Civil Rights movement forced those issues to the forefront, the parties realigned, and polarization began its steady climb to where it is today.
The Gilded Age: A Mirror to Today (1870s–1890s)
Structurally, today's political landscape looks very similar to the Gilded Age. That era featured high levels of inequality, rapid technological change, deeply partisan newspapers (the "yellow journalism" era), and razor-thin election margins that fueled fierce party warfare in Congress.
The Civil War Era: The Worst Ever (1850s–1860s)
The 1850s remain the absolute worst period of polarization in U.S. history. Polarization was so severe that the nation’s institutional guardrails completely collapsed. Congressmen physically assaulted each other on the Senate floor, the Supreme Court's decisions (like the Dred Scott case) were widely rejected as illegitimate, and the nation ultimately dissolved into a catastrophic civil war.
The Bottom Line
While we are not on the brink of a literal civil war, political polarization in the U.S. is worse than it has been at any point in the last century.
What makes today's polarization uniquely challenging is that it is fueled by a fragmented, social-media-driven information environment, high-stakes geographic sorting, and deep-seated "affective" hatred. Today, Americans do not just disagree on policy; they increasingly disagree on the very nature of reality and view their political opponents not as rivals, but as existential threats.
Citations (15)
- democracyproject.org
Backs: “Whether political polarization is "worse than it has been in the past" depends on how far back into history you look.”
background, other, neutral. Claim: Whether polarization is worse than in the past depends on how far back one looks.
- gmu.edu
Backs: “Whether political polarization is "worse than it has been in the past" depends on how far back into history you look.”
background, other, neutral. Claim: Whether polarization is worse than in the past depends on how far back one looks.
- syr.edu
Backs: “However, if your point of comparison is the last 100 to 130 years, the answer is yes: by almost every empirical measure, political polarization is worse today than it has been at any point in modern history. To understand where we stand today, political scientists and historians look at polarization through three main…”
evidence, other, points to yes. Claim: Over the last 100-130 years, polarization is worse today by almost every empirical measure.
- pewresearch.org
Backs: “However, if your point of comparison is the last 100 to 130 years, the answer is yes: by almost every empirical measure, political polarization is worse today than it has been at any point in modern history. To understand where we stand today, political scientists and historians look at polarization through three main…”
evidence, other, points to yes. Claim: Over the last 100-130 years, polarization is worse today by almost every empirical measure.
- voteview.com
Backs: “However, if your point of comparison is the last 100 to 130 years, the answer is yes: by almost every empirical measure, political polarization is worse today than it has been at any point in modern history. To understand where we stand today, political scientists and historians look at polarization through three main…”
evidence, data page, points to yes. Claim: Over the last 100-130 years, polarization is worse today by almost every empirical measure.
- wikipedia.org
Backs: “To understand where we stand today, political scientists and historians look at polarization through three main lenses: legislative polarization (how politicians behave), affective polarization (how everyday people feel about each other), and issue sorting (how political beliefs align).”
background, reference entry, neutral. Claim: Political scientists examine legislative polarization, affective polarization, and issue sorting.
- usc.edu
Backs: “Political scientists measure polarization in Congress using a system called DW-NOMINATE, which maps politicians' ideologies on a scale from -1 (most liberal) to +1 (most conservative) based on their roll-call voting records. The Disappearing Middle: In the 1970s, there were hundreds of moderate lawmakers whose voting…”
background, other, neutral. Claim: DW-NOMINATE maps legislators' ideology from -1 to +1 using roll-call votes.
- pewresearch.org
Backs: “There are almost no moderate Democrats to the right of the median Republican, and no moderate Republicans to the left of the median Democrat. Historical Peak: DW-NOMINATE data indicates that the ideological gap between the two major parties in Congress is currently wider than at any point since the Reconstruction Era…”
evidence, article, points to yes. Claim: Almost no moderate Democrats are right of the median Republican, and vice versa.
- cambridge.org
Backs: “Historical Peak: DW-NOMINATE data indicates that the ideological gap between the two major parties in Congress is currently wider than at any point since the Reconstruction Era and the Gilded Age (the late 1870s to the 1890s). Asymmetry: According to the data, this gap has been asymmetric.”
evidence, article, points to yes. Claim: Party ideological gap in Congress is widest since Reconstruction and the Gilded Age.
- pewresearch.org
Backs: “An overwhelming majority (84%) report that political debate has become significantly less respectful and less fact-based. The U.S.”
statistic, article, points to yes. Claim: 84% say political debate has become less respectful and less fact-based.
- brown.edu
Backs: “The U.S. is an International Outlier: A landmark study from Brown University found that while polarization has risen in several countries, the United States has polarized faster than any other comparable democracy (including the UK, Canada, Australia, and Germany). In 1978, the average American rated members of their…”
statistic, article, points to yes. Claim: US has polarized faster than other democracies; the feeling thermometer gap rose from 27 to over 45 points.
- cam.ac.uk
Backs: “Today, Americans are highly sorted. The Cambridge Study: A comprehensive study by the University of Cambridge’s Political Psychology Lab tracked polarization.”
statistic, article, points to yes. Claim: Cambridge study found divisions on issues grew 64%, mostly after 2008.
- youtube.com
Backs: “People are now much more likely to align their entire identity (race, religion, geography, and consumer habits) with their political party, making politics feel like a high-stakes, tribal conflict. ---. How Today Compares to Past Eras”
evidence, social or video, points to yes. Claim: Americans align identity with party, making politics feel like tribal conflict.
- washingtonpost.com
Backs: “During this time, the Democratic Party was a highly unstable coalition of progressive Northern liberals and deeply conservative Southern segregationists. Because both parties contained both liberals and conservatives, compromise was easy, but it came at a high cost: national political stability was largely maintained…”
evidence, article, neutral. Claim: Mid-20th century Democratic Party was a coalition of Northern liberals and Southern segregationists, making compromise easier.
- columbialawreview.org
Backs: “That era featured high levels of inequality, rapid technological change, deeply partisan newspapers (the "yellow journalism" era), and razor-thin election margins that fueled fierce party warfare in Congress. The Civil War Era: The Worst Ever (1850s–1860s)”
evidence, article, neutral. Claim: Gilded Age had inequality, technological change, partisan newspapers, and razor-thin elections fueling party warfare.