Although there are many interpretations of the central themes of Talcott Parsons's sociology, it is evident that the idea of citizenship played a major role in shaping the core of his mature social thought. In addition to specific discussions of citizenship in relation to black inequality and participation, of the historical roots of universal participation in the societal community, and of the political openness and pluralism of American society, the problems of universalistic participation were in fact analytically crucial to Parsonian sociology. In other words, the theme of universalistic values was not merely an empirical issue, and not merely an aspect of political questions in his occasional essays and papers, but it coloured the basic components of Parsons's work as a theorist. For example, the notion of universalism defined one possible mode of orientation to action in the pattern variables, being contrasted with particularism. The pattern variables were not merely a passing phase in Parsons's long theoretical maturation; they were fundamental to what he understood by 'modernity'. They were as a result constitutive of Parsons's understanding of social change theory and modernization processes. Indeed, this theme of universalistic participation, its dependence on the legacy of the Protestant idea of universal salvation and its peculiar role in the formation of western societies, was a co-ordinating theme in Parsons's complex theoretical legacy. In addition to its importance in his theoretical development, it was the foundation of the pressuppositional level of his general value position, because Parsons regarded American society as the culmination of the process of modernity which, as we will see, was a process of universalization. [ABSTRACT FROM AUTHOR]