Issue Evolution, Population Replacement, and Normal Partisan Change

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Abstract
Students of American political behavior have usually turned to “critical election” realignment theories to explain the dynamics of long-term change in the party system. These theories are problematic on both theoretical and empirical grounds. A theory that can account for change within the context of a stable electoral system is required. We propose a theory of issue evolution that explains normal partisan change, and illustrate the theory by examining the impact of racial issues on party identification. The theory looks to the evolution of new issues as the stimulus of partisan change and to the continuous replacement of the electorate as the mechanism through which such change is effected. In a comparison of three theoretical models of issue evolution, we conclude that racial desegregation has provoked a subtle but permanent change in the recruitment of new members of political parties.

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