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GPT-5Sep 18, 2026openai/gpt-5-2025-08-07
Is political polarization worse than it's been in the past?
Short answer (for the United States): Yes—by most modern metrics, polarization is higher today than it’s been in many decades, though not unprecedented in all of American history.
How we know
•In Congress (elite polarization): Roll‑call–based measures show the parties have moved apart steadily since the late 1970s, with almost no ideological overlap today. Party‑line voting and difficulty building cross‑party coalitions are near modern highs.
•Among the public (affective polarization): Since the 1980s, Democrats and Republicans have grown markedly colder toward each other. Partisanship now functions like a social identity; people are less willing to socialize, work with, or marry across party lines than in prior survey eras.
•Voting behavior/geography: Split‑ticket voting has declined; straight‑party voting and “landslide” counties have increased, reflecting nationalized, hardened partisan patterns.
Important caveats
•Not the worst ever: The 1850s (antebellum/Civil War) and parts of Reconstruction featured deeper sectional and often violent conflict than today.
•Mid‑20th century was unusually low: The 1950s–70s saw atypically cross‑pressured parties (liberal Republicans, conservative Southern Democrats). Today looks “worse” largely relative to that low‑polarization baseline.
•Issue nuance: On some specific policies, voters are less far apart than their party identities suggest; polarization is often more about identity and negative partisanship than detailed issue positions.
Drivers often cited
•Ideological and social sorting (race, religion, education, urban–rural)
•Media fragmentation and online ecosystems
•Primary electorates and donor landscapes rewarding ideological purity
•Nationalization of politics that ties local contests to national party conflict
If you had a different country in mind—or want charts for any of these claims—tell me which, and I can pull the latest data.