# Polarization **Polarization** is the pulling-apart of a political community into hostile camps. In political science the word names several distinct things that are often confused, and keeping them separate is essential to understanding how it threatens democracy. ## The key distinctions - **Ideological polarization** — the parties' *policy positions* moving farther apart, leaving fewer moderates in the middle. There is real debate over how much the mass public has actually sorted ideologically versus simply taking clearer partisan cues. - **Affective polarization** — partisans coming to *dislike and distrust* the other side as people, independent of policy disagreement. This is the strand that has grown most sharply and that matters most for democratic stability: when the other party is experienced as an enemy rather than an opponent, the unwritten rules collapse. - **Elite vs. mass polarization** — whether the division is concentrated among politicians, activists, and media (elite) or runs through ordinary voters (mass). The two interact: elite polarization sends signals that sort and harden the mass public. - **Partisan sorting** — the alignment of party with ideology, religion, race, geography, and lifestyle, so that party identity becomes a **mega-identity** bundling everything together. Sorting makes affective polarization worse because every disagreement now feels like an identity threat. ## Asymmetry A substantial body of research (notably the work of Poole, Rosenthal, and McCarty on congressional roll-call voting) finds the polarization of the past half-century has been **asymmetric** — the Republican Party moved right faster and farther than the Democratic Party moved left. This asymmetry is a recurring analytical theme across this KB: the institutional and media infrastructure documented elsewhere (the [[Power Theory]] hub's war-of-position material) is part of why. ## Why it threatens democracy [[Steven Levitsky]] and [[Daniel Ziblatt]] identify severe polarization as a primary driver of democratic erosion: it dissolves the two **[[Democratic Norms]]** that keep competition safe — **mutual toleration** (accepting opponents as legitimate) and **forbearance** (not weaponizing every institutional power). Once the other side is seen as an existential threat, voters and officials tolerate norm-breaking by their own side as the lesser evil, and the ratchet of backsliding begins. ## KB Significance Polarization is the **hinge between political behavior and democratic backsliding**. It is the mass-level condition that makes [[Populism]]'s friend-enemy framing land, that the right-wing media ecosystem (see [[Media Theory Hub]]) amplifies, and that converts ordinary partisan disagreement into the willingness to break the rules that the backsliding literature tracks. Understanding which *kind* of polarization is rising — affective and asymmetric, more than purely ideological — is what makes the concept analytically useful rather than a slogan. ## See Also - [[Public Opinion]] — the attitudes polarization reshapes. - [[Democratic Norms]] — what severe polarization erodes. - [[Populism]] · [[Political Behavior]] · [[Media Theory Hub]]