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

Yes, by multiple standard measures, political polarization in the United States is worse (higher) than it has been for much of the modern era (roughly the post-World War II period or the last 50 years), though it is not unprecedented in all of American history and comparisons depend on the exact metric and timeframe.[1]

Polarization is typically broken into types: ideological/issue-based (disagreement on policies and values), affective (emotional dislike or distrust of the other side), and elite (among politicians and parties) versus mass public. Evidence from surveys, roll-call voting, and expert assessments consistently shows increases in recent decades.

Elite and Congressional Polarization

In Congress, Democrats and Republicans are farther apart ideologically than at any time in the past 50 years, based on DW-NOMINATE scores derived from roll-call votes. Both parties have become more internally cohesive (far fewer moderates), with the zone of ideological overlap disappearing—none in the House since around 2002 and the Senate shortly after.[1]

Republicans have shifted more to the right on average, while Democrats have moved somewhat left. Geographic and demographic sorting (e.g., more Southern Republicans, more diverse Democrats) has reinforced this. Levels approach or match those of the late 19th century (Reconstruction/Gilded Age) in some analyses, though the mid-20th century featured more bipartisanship.[1]

Public Opinion: Issue and Ideological Polarization

Among the public, partisan divides on issues and values have widened substantially. Pew Research data show the gap between Democrats and Republicans on a range of political values growing from about 15 points in 1994 to 36 points by the mid-2010s, with medians of each party now more extreme relative to the other than in prior decades. Ideological consistency has risen, and partisan sorting (aligning identity with views) has increased.[2]

A 2026 Cambridge University analysis of American National Election Studies data (1988–2024) found issue polarization (separation between left- and right-leaning clusters) rose 64% since 1988, with nearly all the increase after 2008. The left-leaning cluster became substantially more socially liberal (e.g., on abortion, equality, traditional values), while the right shifted only modestly conservative. Clusters remained roughly equal in size and internally cohesive. Sorting by party/ideology labels also rose. Polarization may have leveled somewhat recently but remains elevated.[3]

Pew and other surveys document growing gaps on specific issues like climate, guns, and abortion. Americans widely perceive the divide as larger than in the past and the tone of debate as less respectful and fact-based.[4]

Affective Polarization

Emotional hostility has also intensified. Feeling thermometer ratings (warmth toward own party vs. opposing party) show out-party ratings dropping sharply over decades (e.g., from near-neutral in the late 1970s to much colder recently), while in-party ratings stayed relatively stable or declined less. Gaps reached record highs in recent election cycles.[5]

Cross-national studies find the U.S. experienced the largest rise in affective polarization among several OECD countries over recent decades. Negative partisanship (dislike of the other side driving politics more than positive attachment) has grown.[6]

Broader and Comparative Context

V-Dem (Varieties of Democracy) expert assessments of societal polarization into antagonistic camps show the U.S. rising sharply since around 2000–2010s to “pernicious” levels (high hostility spilling into social relations). It stands out as the only wealthy Western liberal democracy with persistently high levels; peers rarely reach them, and the world average rose more modestly.[7]

Globally, negative partisanship has increased in many democracies since the Cold War (accelerating after 2008/2016 in some data), but the U.S. pattern is particularly intense, aided by its near-even 50/50 split and two-party system.[8]

Historical Perspective and Caveats

American history includes far more extreme periods: the Civil War era (sectional polarization over slavery leading to actual war, with parties realigning and violence widespread), Reconstruction, and the 1890s. The 1960s featured intense conflict over race and Vietnam. Some analysts note that mid-20th-century “consensus” partly reflected suppressed issues (e.g., limited challenges to segregation). Current levels are high for a stable peacetime democracy but lack the existential stakes or organized violence of those eras (though political threats and incidents have risen).[9]

Debates exist on asymmetry: some studies emphasize greater leftward movement on social issues among the public; others highlight rightward elite shifts, Republican cohesion, or illiberal tendencies on the right. Media fragmentation, social media, demographic sorting, economic/cultural changes, and elite cues are common explanations. Local communities and non-political life often show more resilience than national discourse suggests. Polarization can feel amplified by selective media and online environments.[10]

In short, for the contemporary period that most people experience and measure with modern data, polarization—especially affective dislike, partisan sorting, elite division, and issue gaps—is markedly worse than in the late 20th century and among the highest in decades. It is a defining feature of recent U.S. politics, with real consequences for governance, trust, and social relations, even if history shows societies can endure (and sometimes resolve) high conflict.