The 1960 publication of ‘The American Voter’, which revealed that voters have stable affective ties to political parties, transformed political alignment into one of the central objects of contemporary political analysis. It was in , however, that the social bases of such links were investigated and found to be formed by means of the concept of ‘cleavages’. Stability, then, comes from the links that party systems maintain with social structures in such a way that different models of society produce […]