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 divide the question into two timelines: the recent past (the last 50 to 60 years) and the deep past (the late 18th and 19th centuries).

The short answer is: Yes, polarization is worse than at any point in the lifetimes of almost all living Americans. However, it is not yet as severe as the absolute worst periods in American history, such as the decade leading up to the Civil War.

1. Yes, It is Worse Than in the Recent Past (1940s–2000s)

If we compare today's political climate to the mid-20th century, polarization has skyrocketed.

•The Decline of the "Middle": From the 1940s through the 1970s, the two major American parties had significant ideological overlap. There were conservative Southern Democrats and liberal Northern Republicans. Today, that overlap has virtually disappeared. According to political scientists tracking DW-NOMINATE scores (which measure congressional voting records), the ideological distance between Democrats and Republicans has grown steadily since the 1970s. Congress is now more divided than at any point since the Reconstruction era.

•The Rise of "Affective" (Emotional) Polarization: Polarization is no longer just about disagreeing on tax rates or infrastructure. It has become affective, meaning voters increasingly dislike, distrust, and fear members of the opposing party. In public opinion polls, growing numbers of Americans describe the opposing party as closed-minded, dishonest, or an existential threat.

•A Turn in 2008: A study by the University of Cambridge found that while polarization was relatively stable in the 1990s and early 2000s, it accelerated dramatically starting around 2008 (coinciding with the financial crisis, the election of Barack Obama, and the rise of smartphones/social media).

•The U.S. is an Outlier: While polarization is rising globally, research from Brown University indicates that affective polarization is growing faster in the United States than in other major democracies like Canada, the United Kingdom, Australia, or Germany.

2. No, It is Not as Bad as the Deep Past (1790s–1890s)

When looking at the full arc of American history, the country has survived several periods of division that were far more volatile, violent, and systemically destructive than what we see today.

•The Civil War Era (1850s–1860s): This remains the ultimate failure of American political compromise. The moral battle over slavery completely broke the political system, leading to the secession of the Southern states and a war that killed more than 600,000 Americans.

•The Reconstruction and Gilded Age (1870s–1890s): The late 19th century was characterized by extreme congressional division, fierce partisanship, and "constitutional hardball". It was also an era of widespread political violence (especially targeting Black voters and Republicans in the South) and deadly labor strikes. Like today, this era was defined by rapid technological change, massive immigration, and historic wealth inequality.

•The Early Republic (1790s–1800s): The division between the Federalists and the Democratic-Republicans (led by Thomas Jefferson) was incredibly bitter. The ruling Federalists passed the Alien and Sedition Acts to lock up political opponents, politicians routinely engaged in deadly duels (such as Alexander Hamilton and Aaron Burr), and some states openly threatened to secede.

Why Does Today’s Polarization Feel Unique?

While we are not in a civil war, modern polarization has unique characteristics that make it feel exceptionally exhausting and intractable:

1."Social Sorting": In the mid-20th century, a person's political party didn't necessarily tell you their religion, race, education level, or where they lived. Today, these identities have aligned. Politics has become a "mega-identity," meaning a political disagreement feels like a personal attack on who you are.

2.The Nationalization of Media: In the 19th century, political bubbles were local. Today, 24-hour cable news and social media algorithms have nationalized our divisions. People across the country are fed highly tailored, emotionally charged information that reinforces negative views of the "other side" on a minute-by-minute basis.

3.The "I-We-I" Curve: Sociologist Robert Putnam describes American history as a century-long curve. The late 1800s were highly individualistic and divided ("I"). By the mid-20th century, the country moved toward a more cooperative, community-minded consensus ("We"). Today, we have swung back to an extreme "I" phase of fragmentation and tribalism.

Summary

If your baseline of comparison is the late 20th century, politics today is indeed more polarized, hostile, and gridlocked than it has been in your lifetime. However, American history shows that the U.S. has navigated similarly perilous waters before—and survived—though sometimes at an immense cost.

Citations (14)

1usc.eduAcademic
usc.edu
Backs: “The Decline of the "Middle": From the 1940s through the 1970s, the two major American parties had significant ideological overlap. There were conservative Southern Democrats and liberal Northern Republicans.”
2brookings.eduNonprofits and think tanks
brookings.edu
Backs: “The Decline of the "Middle": From the 1940s through the 1970s, the two major American parties had significant ideological overlap. There were conservative Southern Democrats and liberal Northern Republicans.”
3usc.eduAcademic
usc.edu
Backs: “According to political scientists tracking DW-NOMINATE scores (which measure congressional voting records), the ideological distance between Democrats and Republicans has grown steadily since the 1970s. Congress is now more divided than at any point since the Reconstruction era.”
4wikipedia.orgEncyclopedias and referencequality 0.83
wikipedia.org
Backs: “The Rise of "Affective" (Emotional) Polarization: Polarization is no longer just about disagreeing on tax rates or infrastructure. It has become affective, meaning voters increasingly dislike, distrust, and fear members of the opposing party.”
5facinghistory.orgNonprofits and think tanks
facinghistory.org
Backs: “It has become affective, meaning voters increasingly dislike, distrust, and fear members of the opposing party. In public opinion polls, growing numbers of Americans describe the opposing party as closed-minded, dishonest, or an existential threat.”
6cam.ac.ukAcademic
cam.ac.uk
Backs: “A Turn in 2008: A study by the University of Cambridge found that while polarization was relatively stable in the 1990s and early 2000s, it accelerated dramatically starting around 2008 (coinciding with the financial crisis, the election of Barack Obama, and the rise of smartphones/social media).”
7brown.eduAcademic
brown.edu
Backs: “The U.S. is an Outlier: While polarization is rising globally, research from Brown University indicates that affective polarization is growing faster in the United States than in other major democracies like Canada, the United Kingdom, Australia, or Germany.”
8democracyproject.orgNonprofits and think tanks
democracyproject.org
Backs: “The Civil War Era (1850s–1860s): This remains the ultimate failure of American political compromise. The moral battle over slavery completely broke the political system, leading to the secession of the Southern states and a war that killed more than 600,000 Americans.”
9brookings.eduNonprofits and think tanks
brookings.edu
Backs: “The Civil War Era (1850s–1860s): This remains the ultimate failure of American political compromise. The moral battle over slavery completely broke the political system, leading to the secession of the Southern states and a war that killed more than 600,000 Americans.”
10cpreview.orgNot yet classified
cpreview.org
Backs: “The moral battle over slavery completely broke the political system, leading to the secession of the Southern states and a war that killed more than 600,000 Americans. The Reconstruction and Gilded Age (1870s–1890s): The late 19th century was characterized by extreme congressional division, fierce partisanship, and…”
11reddit.comForums and Q&A
reddit.com
Backs: “It was also an era of widespread political violence (especially targeting Black voters and Republicans in the South) and deadly labor strikes. Like today, this era was defined by rapid technological change, massive immigration, and historic wealth inequality.”
12cfr.orgNonprofits and think tanks
cfr.org
Backs: “Like today, this era was defined by rapid technological change, massive immigration, and historic wealth inequality. The Early Republic (1790s–1800s): The division between the Federalists and the Democratic-Republicans (led by Thomas Jefferson) was incredibly bitter.”
13reddit.comForums and Q&A
reddit.com
Backs: “"Social Sorting": In the mid-20th century, a person's political party didn't necessarily tell you their religion, race, education level, or where they lived. Today, these identities have aligned.”
14gmu.eduAcademic
gmu.edu
Backs: “The "I-We-I" Curve: Sociologist Robert Putnam describes American history as a century-long curve. The late 1800s were highly individualistic and divided ("I").”