premise: And it is clearly argued by Lord Percy of Newcastle , in his remarkable long <mask> , The Heresy of Democracy , and in a more general way by Voegelin , in his New Science of Politics , that this same Rousseauan idea , descending through European democracy , is the source of Marx 's theory of the dictatorship of the proletariat .
hypothesis: the proper context for <mask> here should be an analytic or interpretive literary composition