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

To answer whether political polarization is worse than it has been in the past, it helps to look at two different benchmarks: the recent past (the last 50 to 70 years) and the entirety of American history.

The short answer is: Yes, polarization is worse than it has been in any living American's memory, but it is not the worst it has ever been in the nation's history.

The current state of division compares to past eras in several distinct ways:

1. Compared to the Recent Past: Yes, It is Significantly Worse

If you compare today’s political landscape to the mid-to-late 20th century, the United States is vastly more polarized.

•The Disappearance of the "Center": In the 1950s, 60s, and 70s, there was substantial ideological overlap between the Democratic and Republican parties. You could easily find conservative Democrats (mostly from the South) and liberal Republicans (mostly from the Northeast). Today, that overlap has completely vanished. Political scientists who track roll-call voting records (using a metric called DW-NOMINATE) note that the "overlap interval"—the space where moderate members of both parties vote similarly—is now at zero.

•The Rise of "Affective Polarization": Polarization is no longer just about disagreeing on tax rates or infrastructure spend. It has become "affective," meaning voters do not just disagree with the opposing party—they actively dislike and distrust them. According to Pew Research Center, the share of Democrats and Republicans who view the other party as "immoral" or a threat to the nation’s well-being has surged dramatically.

•The U.S. is an International Outlier: While polarization is rising globally, research from institutions like Brown and Stanford shows that affective polarization has grown much faster and more severely in the United States than in other major democracies like Canada, the UK, Germany, or Australia.

2. Compared to Deep American History: No, It Is Not "Worse Than Ever"

When looking at the full arc of U.S. history, the current era is not the most polarized the country has been.

•The Civil War Era (1850s–1860s): This remains the ultimate benchmark of American polarization. During this period, disagreements over slavery and state sovereignty were deeply moralized, leaving no room for legislative compromise. This division led to secession, a total collapse of the constitutional system, and a civil war that resulted in the deaths of hundreds of thousands of Americans.

•The Reconstruction and Gilded Age (1870s–1890s): Following the Civil War, the late 19th century was characterized by extreme partisanship, intense media bias (via the "partisan press"), and frequent government gridlock. Political scientists point out that congressional voting polarization today has only recently matched the extreme levels of the 1870s Reconstruction era.

Why the Mid-20th Century Was an "Anomaly"

When people look back at a time of "political civility" and bipartisan cooperation, they are usually looking at the mid-20th century (roughly the 1940s through the early 1970s).

However, historians point out that this era of low polarization was actually a historical anomaly. It was forged by unique circumstances: the shared national traumas of the Great Depression and World War II, a booming postwar economy, and the unifying existential threat of the Cold War.

Once those unifying factors faded, and the civil rights movement reshuffled the geographic alignments of the two political parties (with conservative Southern Democrats moving to the Republican Party), the U.S. began returning to its historical baseline of high polarization.

What Makes Modern Polarization Uniquely Dangerous?

Even though the U.S. is not currently fighting a physical civil war, political scientists warn that modern polarization has unique, compounding drivers that make it highly volatile:

1."Mega-Identities": In the past, a person’s political party was just one of many identities. Today, political parties have aligned closely with other deeply personal markers: race, religion, geography (urban vs. rural), and cultural values. When political affiliation is tied to your entire cultural identity, compromise feels like a betrayal of who you are.

2.Media and Technology: The fragmentation of media—from the rise of talk radio and partisan cable news in the 1990s to modern social media algorithms—allows Americans to live in entirely different information ecosystems. People are not just disagreeing on opinions; they are often disagreeing on basic, objective facts.

3.Geographic Sorting: Americans are increasingly "sorting" themselves, choosing to live in neighborhoods and states surrounded by politically like-minded people. This reduces daily, face-to-face interactions with those who hold different views, making it easier to caricature the other side.

Summary

If "the past" means the era of your parents or grandparents, yes, political polarization is worse today than it has been in decades. But if "the past" includes the 19th century, the U.S. has survived deep, structurally violent splits before—though navigating the current divide remains one of the greatest challenges of the modern era.

Citations (12)

1democracyproject.orgNonprofits and think tanks
democracyproject.org
Backs: “To answer whether political polarization is worse than it has been in the past, it helps to look at two different benchmarks: the recent past (the last 50 to 70 years) and the entirety of American history.”
2pewresearch.orgNonprofits and think tanks
pewresearch.org
Backs: “To answer whether political polarization is worse than it has been in the past, it helps to look at two different benchmarks: the recent past (the last 50 to 70 years) and the entirety of American history.”
3usc.eduAcademic
usc.edu
Backs: “The Disappearance of the "Center": In the 1950s, 60s, and 70s, there was substantial ideological overlap between the Democratic and Republican parties. You could easily find conservative Democrats (mostly from the South) and liberal Republicans (mostly from the Northeast).”
4amacad.orgNot yet classified
amacad.org
Backs: “You could easily find conservative Democrats (mostly from the South) and liberal Republicans (mostly from the Northeast). Today, that overlap has completely vanished.”
5brookings.eduNonprofits and think tanks
brookings.edu
Backs: “Today, that overlap has completely vanished. Political scientists who track roll-call voting records (using a metric called DW-NOMINATE) note that the "overlap interval"—the space where moderate members of both parties vote similarly—is now at zero.”
6usc.eduAcademic
usc.edu
Backs: “Political scientists who track roll-call voting records (using a metric called DW-NOMINATE) note that the "overlap interval"—the space where moderate members of both parties vote similarly—is now at zero. The Rise of "Affective Polarization": Polarization is no longer just about disagreeing on tax rates or…”
7stanford.eduAcademic
stanford.edu
Backs: “The Rise of "Affective Polarization": Polarization is no longer just about disagreeing on tax rates or infrastructure spend. It has become "affective," meaning voters do not just disagree with the opposing party—they actively dislike and distrust them.”
8brown.eduAcademic
brown.edu
Backs: “It has become "affective," meaning voters do not just disagree with the opposing party—they actively dislike and distrust them. According to Pew Research Center, the share of Democrats and Republicans who view the other party as "immoral" or a threat to the nation’s well-being has surged dramatically.”
9syr.eduAcademic
syr.edu
Backs: “According to Pew Research Center, the share of Democrats and Republicans who view the other party as "immoral" or a threat to the nation’s well-being has surged dramatically. The U.S.”
10brookings.eduNonprofits and think tanks
brookings.edu
Backs: “During this period, disagreements over slavery and state sovereignty were deeply moralized, leaving no room for legislative compromise. This division led to secession, a total collapse of the constitutional system, and a civil war that resulted in the deaths of hundreds of thousands of Americans.”
11democracyproject.orgNonprofits and think tanks
democracyproject.org
Backs: “The Reconstruction and Gilded Age (1870s–1890s): Following the Civil War, the late 19th century was characterized by extreme partisanship, intense media bias (via the "partisan press"), and frequent government gridlock. Political scientists point out that congressional voting polarization today has only recently…”
12wikiversity.orgNot yet classified
wikiversity.org
Backs: “Why the Mid-20th Century Was an "Anomaly". When people look back at a time of "political civility" and bipartisan cooperation, they are usually looking at the mid-20th century (roughly the 1940s through the early 1970s). However, historians point out that this era of low polarization was actually a historical anomaly.”