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

Whether political polarization is "worse than it’s been in the past" depends entirely on which era of history you are comparing it to.

If you compare today to the mid-to-late 20th century, then yes, political polarization is significantly worse and has reached levels not seen in generations. However, if you look at the entirety of American history, we are not at our absolute worst. The nation has survived periods of much deeper, more violent division—most notably the Civil War.

A closer look at how modern political polarization compares to the past reveals several key dynamics.

1. Why Polarization Is Worse Than in Recent Memory

When people feel that the country is more divided than ever, their point of comparison is usually the period between the 1940s and the 1980s. By almost every metric, polarization has worsened dramatically since then.

•The Disappearance of the Political Center: In Congress, the ideological overlap between Democrats and Republicans has virtually vanished. Political scientists track this using DW-NOMINATE scores (which analyze congressional roll-call votes). These scores show that Congress is more divided today than at any point since the Reconstruction Era of the late 1870s. Moderate lawmakers, once a powerful voting bloc that brokered compromises, have all but disappeared.

•The Rise of "Affective Polarization": Polarization today is not just about disagreeing on policy; it is about disliking the other side. This is known as "affective polarization." Pew Research Center data shows a massive spike in partisan animosity. For example, the percentage of Democrats and Republicans who view the opposing party as not just mistaken, but "immoral" and a threat to the nation's well-being, has doubled over the last decade.

•Partisan "Sorting": In the past, political party was just one of many identities. Today, political party has become a "mega-identity" that is deeply aligned with geography (urban vs. rural), religion, race, education, and cultural tastes. Because these identities are "sorted" into two distinct camps, there are very few "cross-cutting cleavages" left to bind Americans of different political persuasions together.

•An International Outlier: Research from institutions like Brown University indicates that while polarization has risen globally, the United States has polarized faster and more deeply over the last 40 years than other established democracies like Canada, the UK, Germany, or Australia.

2. Why Polarization is Not the Worst in U.S. History

While today’s division is severe, American history is punctuated by eras of extreme conflict that dwarf our current moment in terms of physical violence and constitutional collapse.

•The Civil War (1861–1865): The ultimate failure of political compromise. Polarization over slavery, state sovereignty, and economics led to a literal secession of states and a war that resulted in the deaths of roughly 620,000 Americans. By comparison, today's division—while tense and occasionally punctuated by political violence—has not led to a systemic breakdown of the union.

•The Gilded Age and Reconstruction (Late 19th Century): The late 1800s saw incredibly fierce partisan warfare. Elections were highly corrupt, political violence in the South was rampant as Reconstruction was dismantled, and the media of the time was openly and aggressively partisan.

•The 1960s and Early 1970s: Though the political parties themselves were more ideologically diverse during this time, societal polarization was incredibly high. The country was rocked by the civil rights movement, the Vietnam War, massive urban riots, political assassinations (Martin Luther King Jr., Robert F. Kennedy, John F. Kennedy), and the Watergate scandal.

3. The "Consensus Era" Myth

To understand why today feels so unprecedentedly polarized, it helps to look at the mid-20th century (roughly 1945 to 1975).

During this "Era of Consensus," political parties were not clean ideological packages. The Democratic Party contained both liberal northern reformers and deeply conservative southern segregationists. The Republican Party had both conservative midwesterners and liberal northeastern "Rockefeller Republicans." Because both parties had internal ideological mixtures, bipartisan coalitions were easy to build.

However, political scientists point out that this era of low polarization was a historical anomaly. It was held together by:

1.The shared national trauma and triumph of World War II.

2.The existential threat of the Cold War, which forced a united front.

3.The exclusion of civil rights from mainstream federal legislative debate for decades (once the civil rights movement forced the issue, the conservative Southern Democrats began migrating to the Republican Party, kicking off the "sorting" we see today).

When the Cold War ended and the parties finished sorting ideologically, American politics simply returned to its historical norm: fierce, partisan division.

Summary: What is Different About Today?

While we are not in a literal Civil War, today's polarization has unique, modern drivers that make it uniquely difficult to resolve:

•The Media Ecosystem: The fragmentation of media (the transition from three major objective TV networks to partisan cable news and internet algorithms) allows citizens to live in entirely different information ecosystems, agreeing on neither the solutions to problems nor the basic facts of reality.

•Asymmetrical Shifts: While both sides have moved apart, data shows that polarization has been asymmetric. Congressional voting records show that elite Republicans have moved significantly further to the right over the last few decades. Meanwhile, polling on cultural and social issues shows that the left-leaning public has shifted significantly further left over the past 15 years, widening the cultural gulf.

Ultimately, yes, political polarization is worse than it has been in the lifetime of most living Americans. But no, it is not the worst the country has ever endured. American democracy has survived deep fractures before, though healing them has historically required major external shocks or generational political realignments.

Citations (8)

1usc.eduAcademic
usc.edu
Backs: “If you compare today to the mid-to-late 20th century, then yes, political polarization is significantly worse and has reached levels not seen in generations. However, if you look at the entirety of American history, we are not at our absolute worst.”
2pewresearch.orgNonprofits and think tanks
pewresearch.org
Backs: “If you compare today to the mid-to-late 20th century, then yes, political polarization is significantly worse and has reached levels not seen in generations. However, if you look at the entirety of American history, we are not at our absolute worst.”
3democracyproject.orgNonprofits and think tanks
democracyproject.org
Backs: “The nation has survived periods of much deeper, more violent division—most notably the Civil War. A closer look at how modern political polarization compares to the past reveals several key dynamics.”
4brown.eduAcademic
brown.edu
Backs: “The Rise of "Affective Polarization": Polarization today is not just about disagreeing on policy; it is about disliking the other side. This is known as "affective polarization." Pew Research Center data shows a massive spike in partisan animosity.”
5wikipedia.orgEncyclopedias and referencequality 0.83
wikipedia.org
Backs: “The Rise of "Affective Polarization": Polarization today is not just about disagreeing on policy; it is about disliking the other side. This is known as "affective polarization." Pew Research Center data shows a massive spike in partisan animosity.”
6syr.eduAcademic
syr.edu
Backs: “This is known as "affective polarization." Pew Research Center data shows a massive spike in partisan animosity. For example, the percentage of Democrats and Republicans who view the opposing party as not just mistaken, but "immoral" and a threat to the nation's well-being, has doubled over the last decade.”
7cam.ac.ukAcademic
cam.ac.uk
Backs: “rural), religion, race, education, and cultural tastes. Because these identities are "sorted" into two distinct camps, there are very few "cross-cutting cleavages" left to bind Americans of different political persuasions together.”
8facinghistory.orgNonprofits and think tanks
facinghistory.org
Backs: “During this "Era of Consensus," political parties were not clean ideological packages. The Democratic Party contained both liberal northern reformers and deeply conservative southern segregationists.”