Is political polarization worse than it's been in the past?

Leans yesSays it is contested

To answer whether political polarization is worse today than in the past, it helps to divide the question into two frames of reference: the recent past (the last 40 to 50 years) and deep history (the late 18th and 19th centuries).

The short answer is yes, political polarization is significantly worse than it has been in modern memory. However, it is not the worst it has ever been in the full span of American history.

Here is how today's political division compares to different eras in history, and what makes the current moment unique.

1. The Recent Past (1950s–1980s): An Era of Relative Consensus

If you compare today to the mid-to-late 20th century, polarization is vastly worse.

The mid-20th century is often viewed by political scientists as a historical anomaly of low polarization. During this "era of consensus," the political parties were not yet cleanly divided by ideology:

•Lack of "Sorting": The Democratic Party contained both liberal northern reformers and deeply conservative southern segregationists. Meanwhile, the Republican Party featured both conservative midwesterners and liberal northeastern "Rockefeller Republicans."

•Bipartisanship: Because of this overlap, cross-party coalitions were common, and major legislation (like the Civil Rights Act of 1964 or the creation of the interstate highway system) required and received bipartisan support.

Over the last 50 years, the parties underwent "ideological sorting." Conservative Democrats became Republicans, and liberal Republicans became Democrats. Today, there is virtually no ideological overlap between the two parties in Congress.

A study from the University of Cambridge tracked U.S. political attitudes from 1988 to 2024. The researchers found that divisions on social and political issues grew by 64% over this period, with the vast majority of that increase accelerating after 2008—the year of the global financial crisis, the election of Barack Obama, and the rise of smartphones and social media.

2. The Deep Past: Has It Been Worse?

When looking at the entire arc of American history, we have experienced several periods of intense, sometimes violent, polarization.

•The Civil War Era (1850s–1860s): This is the undisputed peak of American polarization. The division over slavery was so profound that it led to the total collapse of the political system, the secession of southern states, and a civil war that claimed hundreds of thousands of lives. Today's divisions, while deep, have not reached the level of military conflict.

•The Founding Era (1790s–1800s): The early republic was incredibly vicious. The split between Alexander Hamilton’s Federalists and Thomas Jefferson’s Democratic-Republicans was characterized by conspiracy-laden partisan newspapers, physical brawls on the floor of Congress, and the passage of the Alien and Sedition Acts (which the ruling party used to jail opposing journalists).

•The Reconstruction and Gilded Age (1870s–1900): Political scientists using roll-call voting data (known as NOMINATE scores) have found that polarization in Congress today is roughly comparable to the late 1870s and 1880s. That era was also characterized by extreme partisan gridlock, widespread political violence, and severe regional divides.

3. What Makes Today’s Polarization Unique?

While the ideological distance between the parties is comparable to the Gilded Age, today's polarization has features that make it feel uniquely intractable.

Affective Polarization (Dislike vs. Disagreement)

Political scientists distinguish between ideological polarization (disagreeing on policy) and affective polarization (how much you actively dislike and distrust the other side).
While Americans’ policy views on many issues are actually more moderate than the loudest voices suggest, affective polarization is at historic highs. Pew Research polling shows that in 1994, only about 16% of Democrats and 17% of Republicans held a "very unfavorable" view of the opposing party. By 2022, those numbers had skyrocketed to over 50% for both sides. Today, a majority of partisans view the other side not just as mistaken, but as "immoral" and a threat to the nation.

Comprehensive Social Alignment

In the past, a person’s political party was just one of many identities. Today, political parties have become "mega-identities" that align with almost every other aspect of a person's life:

•Geography: Urban areas are overwhelmingly Democratic; rural areas are overwhelmingly Republican.

•Demographics: Deep splits have formed along lines of race, religion, and increasingly, college education.

•Lifestyle: Media consumption, consumer brands, and even where people choose to live are increasingly coded by politics.

When political affiliation aligns perfectly with cultural, geographical, and social identities, a threat to one's political party feels like an existential threat to one's entire way of life.

The Media and Technology Ecosystem

Unlike the Gilded Age, modern polarization is supercharged by the internet, 24-hour cable news, and social media algorithms. These platforms are optimized for engagement, and the most engaging content is often that which provokes outrage, fear, or contempt toward the "out-group". This creates "echo chambers" where citizens are exposed to completely different sets of facts and narratives, making common ground nearly impossible to find.

Summary

If your point of comparison is the 20th century, political polarization is worse than it has been in any living American's lifetime. But if your point of comparison is the 19th century, the nation has survived similar—and indeed more violent—crises of division. What makes the current era uniquely dangerous is not just the depth of the ideological divide, but the highly personalized animosity (affective polarization) fueled by a fragmented, algorithmically driven media landscape.

Citations (10)

1usc.eduAcademic
usc.edu
Backs: “The Recent Past (1950s–1980s): An Era of Relative Consensus. If you compare today to the mid-to-late 20th century, polarization is vastly worse.”
evidence, article, points to yes. Claim: Compared with the mid-to-late 20th century, polarization is vastly worse today.
2emerald.comAcademic
emerald.com
Backs: “The mid-20th century is often viewed by political scientists as a historical anomaly of low polarization. During this "era of consensus," the political parties were not yet cleanly divided by ideology:”
attribution, article, points to yes. Claim: Political scientists view the mid-20th century as a historical anomaly of low polarization.
3cam.ac.ukAcademic
cam.ac.uk
Backs: “During this "era of consensus," the political parties were not yet cleanly divided by ideology: Lack of "Sorting": The Democratic Party contained both liberal northern reformers and deeply conservative southern segregationists.”
evidence, article, points to yes. Claim: During the era of consensus, parties were not yet cleanly divided by ideology.
4courthousenews.comNews and mediaquality 0.87
courthousenews.com
Backs: “A study from the University of Cambridge tracked U.S. political attitudes from 1988 to 2024. The researchers found that divisions on social and political issues grew by 64% over this period, with the vast majority of that increase accelerating after 2008—the year of the global financial crisis, the election of Barack…”
statistic, article, points to yes. Claim: A Cambridge study tracking 1988 to 2024 found divisions on issues grew 64%, mostly after 2008.
5democracyproject.orgNonprofits and think tanks
democracyproject.org
Backs: “When looking at the entire arc of American history, we have experienced several periods of intense, sometimes violent, polarization. The Civil War Era (1850s–1860s): This is the undisputed peak of American polarization.”
background, article, points to no. Claim: American history includes several earlier periods of intense, sometimes violent, polarization.
6wikipedia.orgEncyclopedias and referencequality 0.83
wikipedia.org
Backs: “The division over slavery was so profound that it led to the total collapse of the political system, the secession of southern states, and a civil war that claimed hundreds of thousands of lives. Today's divisions, while deep, have not reached the level of military conflict.”
evidence, reference entry, points to no. Claim: The Civil War era's division over slavery caused system collapse, secession and a war killing hundreds of thousands.
7reddit.comForums and Q&A
reddit.com
Backs: “Political scientists distinguish between ideological polarization (disagreeing on policy) and affective polarization (how much you actively dislike and distrust the other side). While Americans’ policy views on many issues are actually more moderate than the loudest voices suggest, affective polarization is at…”
background, other, neutral. Claim: Political scientists distinguish ideological polarization from affective polarization.
8wikipedia.orgEncyclopedias and referencequality 0.83
wikipedia.org
Backs: “Political scientists distinguish between ideological polarization (disagreeing on policy) and affective polarization (how much you actively dislike and distrust the other side). While Americans’ policy views on many issues are actually more moderate than the loudest voices suggest, affective polarization is at…”
background, reference entry, neutral. Claim: Political scientists distinguish ideological polarization from affective polarization.
9syr.eduAcademic
syr.edu
Backs: “While Americans’ policy views on many issues are actually more moderate than the loudest voices suggest, affective polarization is at historic highs. Pew Research polling shows that in 1994, only about 16% of Democrats and 17% of Republicans held a "very unfavorable" view of the opposing party.”
statistic, article, points to yes. Claim: Affective polarization is at historic highs; Pew shows very unfavorable views of the other party rose from about 16-17% in 1994 to over 50%.
10brown.eduAcademic
brown.edu
Backs: “The Media and Technology Ecosystem. Unlike the Gilded Age, modern polarization is supercharged by the internet, 24-hour cable news, and social media algorithms. These platforms are optimized for engagement, and the most engaging content is often that which provokes outrage, fear, or contempt toward the "out-group".”
evidence, article, points to yes. Claim: Internet, cable news and social media algorithms amplify modern polarization by rewarding outrage and creating echo chambers.