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Muse Spark 1.2Sep 21, 2026meta/muse-spark-1.2-20260805

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

Polarization past vs. present — I'll check what current research says.

Yes - compared to recent decades, but not compared to all of American history.

Worse than the last 50-75 years

By most quantitative measures of the modern era, polarization is at a high point:

•Previous research suggests that political polarization in the United States is more pronounced now than in the past -- at least among members of the nation's major political parties
•A Pew Research Center analysis from 2022 found the perception that polarization has increased is correct: Democrats and Republicans are farther apart ideologically today than at any time in the past 50 years.
•Congress reflects that shift. In the 117th U.S. Congress from 2021 to 2023, there were about two dozen moderate Democrats and Republicans. For comparison, there were more than 160 moderates five decades earlier during the 92nd U.S. Congress from 1971-1972.
•At the mass-public level:
•The overall share of Americans who express consistently conservative or consistently liberal opinions has doubled over the past two decades from 10% to 21%. Historical data from the Pew Research Center illustrates the same, where proportion expressing consistently conservative or liberal opinions increased from 10% in 1994 to 21% in 2014, while ideological overlap significantly declined
•Today, 92% of Republicans are to the right of the median (middle) Democrat, compared with 64% twenty years ago. And 94% of Democrats are to the left of the median Republican, up from 70% in 1994.
•Across 48 different questions covering values about government, foreign policy, social and economic issues, the average difference between the opinions of Republicans and Democrats now stands at 18 percentage points...nearly twice the size of the gap in surveys conducted from 1987-2002. When Pew started the survey in 1987 the average difference was 10 percentage points; in 2012, it was 18 percentage points.
•Beyond ideological consistency, scholars are particularly concerned about "affective polarization" - personal dislike/distrust of the other side. Affective polarization, calculated as the difference on a "feeling thermometer" scale from 0 to 100, rose from 22.64 degrees in 1978 to 40.87 degrees in 2016.

Political science measures based on congressional roll-call voting show the same trend. Using DW-NOMINATE scores:

> Polarization of the Democratic and Republican Parties is higher than at any time since the end of the Civil War.

> The level of polarization in Congress is now the highest since the end of the Civil War and shows no sign that it will abate.

Not worse than the most divisive periods in U.S. history

Historians caution against calling the present the most divided period ever:

> "The most divisive time in our history was in the years leading up to the Civil War," he says. "In the mid-19th Century, differences were so profound representatives carried weapons into Congress."

Broader historical analyses make a similar point:

> for all the hype about the ruptures and partisan rancor in contemporary American society, the strife pales in comparison with much of the nation's past. ... There have been long stretches of American history in which conflicts were far worse

The Civil War era, Reconstruction, the late 19th century battles over industrialization and immigration, and the 1960s-1970s (Vietnam, civil rights, assassinations and political violence) all featured deeper - and often violent - national fractures than today.

What makes today's polarization feel especially intense to many Americans is not just disagreements on issues, but:

1.Ideological sorting - liberals have become concentrated in the Democratic Party and conservatives in the Republican Party, reducing overlap and the middle ground where moderate-to-liberal Republicans could find common ground with moderate-to-conservative Democrats.
2.Expanded issue conflict - parties now diverge not only on economics but on a wider set of social and cultural conflicts.
3.Affective and social polarization - in-group loyalty and out-group animosity now affect dating, consumer brands, trust in institutions, and willingness to compromise.

In short: polarization is measurably worse than at any point in living memory and in the last 50-150 years of congressional history, but it is not unprecedented - the Civil War era was substantially more polarized and violent.

Citations (5)

  1. 1uwyo.eduAcademic
    Researchers Find Broad Impacts from Political Polarization

    Backs: “By most quantitative measures of the modern era, polarization is at a high point: Previous research suggests that political polarization in the United States is more pronounced now than in the past -- at least among members of the nation's major political parties”

  2. 2dailymiaminews.comLow provenance
    Political polarization is a dating love-block and it may be worse in Trump's second term - Daily Miami News

    Backs: “Previous research suggests that political polarization in the United States is more pronounced now than in the past -- at least among members of the nation's major political parties. A Pew Research Center analysis from 2022 found the perception that polarization has increased is correct: Democrats and Republicans are…”

  3. 3pewresearch.orgNonprofits and think tanks
    Partisan polarization, in Congress and among public, is greater than ever

    Backs: “And 94% of Democrats are to the left of the median Republican, up from 70% in 1994. Across 48 different questions covering values about government, foreign policy, social and economic issues, the average difference between the opinions of Republicans and Democrats now stands at 18 percentage points...nearly twice the…”

  4. 4voteview.comAcademic
    Polity . Volume 46, Number 3 . July 2014 © 2014 Northeastern Political Science Association 0032-3497/14 www.palgravejournals.com/polity/

    Backs: “Political science measures based on congressional roll-call voting show the same trend. Using DW-NOMINATE scores: Polarization of the Democratic and Republican Parties is higher than at any time since the end of the Civil War.”

  5. 5sju.eduAcademic
    Are We Really Living in the Most Divisive Time in American History?

    Backs: “"The most divisive time in our history was in the years leading up to the Civil War," he says. "In the mid-19th Century, differences were so profound representatives carried weapons into Congress."”