Cross-Cutting Cleavages

Cross-cutting cleavages are social divisions that overlap incompletely, such that individuals who share one identity dimension differ on another. In a society with cross-cutting cleavages, a citizen's religious community might contain members of multiple political parties, and her political party might contain members of multiple social classes. The concept, developed by political theorist Seymour Martin Lipset and later formalized by social scientists, identifies cross-cutting ties as a stabilizing force in democratic systems because they prevent any single cleavage from becoming all-encompassing.

The decline of cross-cutting cleavages — and their replacement by reinforcing cleavages in which party, religion, class, and geography all align — is a hallmark of partisan sorting. When cleavages reinforce rather than cross-cut, political conflict becomes totalizing: the other party is not merely wrong on policy but alien in every dimension of social life. The mechanism is social identity: overlapping group memberships dilute partisan identity, while aligned memberships amplify it.

_The disappearance of cross-cutting cleavages is not a natural evolution. It is a political achievement — the result of decades of institutional design, media fragmentation, and geographic mobility that together have sorted Americans into morally segregated communities. The question is not whether we can restore cross-cutting cleavages. It is whether we have the collective will to redesign the institutions that destroyed them._