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

I’ll look up recent data and historical comparisons on political polarization to ground the answer in evidence.I’m pulling up a few of the key studies and Pew reports for more detail on the trends.Yes, by most standard measures, political polarization in the United States is worse (higher) than it has been in recent decades—particularly since the late 20th century—and it stands out as unusually intense and persistent among established Western democracies. However, it is not unprecedented in U.S. history when compared to extreme periods like the lead-up to the Civil War, and “worse” depends on the type of polarization measured (ideological/issue-based, affective/emotional, elite/congressional, or mass public).[1]

Types of Polarization and Recent Trends

Political scientists distinguish several forms:

Congressional/elite level: Democrats and Republicans in Congress are farther apart ideologically than at any point in the past 50+ years (using DW-NOMINATE scores based on roll-call votes). Overlap between the parties has essentially vanished since the early 2000s. Both parties have become more cohesive/internally homogeneous, with Republicans shifting further right on average and Democrats somewhat left. Geographic and demographic realignments (e.g., Southern realignment) contributed. This process has roots going back decades (to the 1970s or earlier) but accelerated.[2]

Mass public issue polarization: A 2024–2026 Cambridge University study using American National Election Studies (ANES) data (1988–2024) and clustering algorithms found that divisions on social/political issues rose ~64% since 1988, with nearly all the increase after 2008 (around the financial crisis, Obama election, and rise of smartphones/social media). The left/progressive cluster became substantially more socially liberal (~31.5% shift), while the right moved only modestly more conservative (~2.8%). Sorting into parties/ideologies also increased. Polarization may have begun leveling off recently but remains far higher than in the 1990s/early 2000s. Divisions are real but still “fuzzy”—Americans are not fully split into impermeable tribes. The U.S. is unusual in having roughly equal-sized left and right clusters, amplifying the sense of conflict (unlike many countries with large majorities on one side).[1]

Other analyses (e.g., Nature Human Behaviour) confirm Democrats and Republicans have grown more ideologically distant over ~30 years, with both moving from the center (at different rates). Partisan gaps on specific issues like climate, guns, and abortion have widened substantially per Pew data.[3]

Affective polarization: This has risen sharply. ANES feeling thermometer data (0–100 scale for warmth toward parties) show out-party ratings dropping from near-neutral (~48–50 in the late 1970s) to much colder (~26 or lower by 2024 in interviewer modes; even lower in self-administered surveys). The gap between in-party and out-party feelings has roughly doubled or more (from ~20–25 points to 50+). In-party warmth has been more stable. This trend accelerated in recent decades and continues. People are more likely to view the other side as a threat, dislike intermarriage across parties, etc.[4]

Pew and Gallup data show growing ideological consistency within parties, fewer moderates, larger partisan gaps on values, and demographic sorting (race, education, urban/rural, geography). Self-identified liberals among Democrats have risen markedly; conservatives dominate Republicans even more.[5]

Historical Comparisons

Internationally: The U.S. is an outlier. Carnegie Endowment analysis found it is the only advanced/wealthy Western democracy to sustain “pernicious” (severe, identity-based, us-vs-them) polarization for an extended period. High polarization elsewhere often occurs in newer or less wealthy democracies and correlates with democratic backsliding risk. Affective polarization rose most in the U.S. among several OECD countries studied. Global issue polarization does not show the same clear post-2008 surge.[7]

Caveats and Nuance

In short, for the contemporary era (especially post-2000/2008), yes—polarization is at multi-decade highs across key dimensions and feels particularly acute due to equal-sized camps, media, and identity fusion. It exceeds typical peacetime levels of the mid-to-late 20th century and is exceptional among peer democracies, but the U.S. has survived (and recovered from) worse or comparable divides in its deeper past. Trends are not inevitable; depolarization has occurred historically elsewhere and in U.S. eras.