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

Whether political polarization is “worse” than it has been in the past depends on which historical era you use as a benchmark.

If the benchmark is the American Civil War (1861–1865), the answer is no. The country is not militarily divided, nor is it on the brink of a formal secessionist conflict that would cost hundreds of thousands of lives.

However, if the benchmark is modern American history (the last 100 to 150 years), the answer is a resounding yes. According to political scientists, historians, and sociologists, the United States is more politically divided today than at any point since the Reconstruction and Gilded Age eras of the late 19th century. Furthermore, the nature of modern polarization is uniquely deep, personal, and hostile compared to past eras.

The current state of polarization can be understood through several key dimensions:

1. Elite Polarization (The View from Congress)

Political scientists measure polarization in Congress using a metric called DW-NOMINATE, which analyzes roll-call voting patterns to map politicians on a liberal-to-conservative spectrum.

2. Affective Polarization (The View from Voters)

While "ideological polarization" refers to disagreements over policy, affective polarization refers to how much members of one political party dislike, distrust, and fear members of the opposing party. This is where modern polarization is historically unprecedented.

3. Social Sorting (Why It Feels More Existential)

In the mid-20th century, a person's political party did not necessarily tell you their race, religion, geographic location, or cultural tastes. You could easily find a rural, church-going, union-member Democrat, or an urban, secular, corporate Republican.

Today, we have experienced social sorting. Our political parties have aligned almost perfectly with other deeply held social identities:

Historical Benchmarks: How Today Compares

To understand if this is truly "worse," it helps to look at the three eras most frequently compared to today:

1. The Mid-20th Century (The "Consensus" Era)

Many people compare today to the 1950s and 1960s and conclude that things have gotten dramatically worse. This is true, but political scientists point out that the mid-20th century was actually a historical anomaly.
The national unity of World War II, a booming post-war economy, and the internal fractures within both major parties (such as Northern vs. Southern Democrats) kept national polarization artificially low. In fact, in 1950, the American Political Science Association published a report complaining that the two parties were too similar and urged them to differentiate themselves more.

2. The Gilded Age (Late 19th Century)

The Gilded Age (the 1870s to 1890s) is the closest quantitative parallel to our current political climate, featuring fierce partisan gridlock and deeply close elections.
However, historians note a key difference: Gilded Age polarization was largely fought over "spoils" (who got government jobs, patronage, and resources). While corrupt and highly partisan, the parties did not always present diametrically opposed, deeply existential ideological visions of the country's moral and cultural future. Today's divisions are deeply rooted in social, cultural, and constitutional values, making them much harder to negotiate.

3. The Civil War (1850s–1860s)

This remains the absolute peak of American polarization. The issue of slavery was fundamentally irreconcilable through the democratic process.
While we are not at this level of physical, militarized conflict, some political scientists warn that our current levels of institutional distrust—where large portions of the population question the legitimacy of elections, the judiciary, and the media—echo the erosion of democratic norms that preceded the Civil War.

Is This Happening Everywhere?

Notably, this rapid rise in affective polarization is somewhat unique to the United States. A landmark study by researchers at Brown and Stanford universities examined polarization trends across nine major democracies (including Canada, the UK, Germany, and Australia) over four decades. They found that while some countries saw mild increases, the United States was an extreme outlier, with affective polarization rising far more rapidly than in any other country studied.

Summary

Is political polarization worse? Yes, for any living generation. While the nation has survived worse divisions—namely the Civil War—the current combination of complete congressional sorting, intense personal hostility between voters (affective polarization), and the stacking of cultural and political identities has created a level of division not seen in over a century.