How are we to explain the current “revolt against the elites,” the “new populist wave,” referred to by the French philosopher, political scientist, and historian of ideas Pierre-André Taguieff in a recent interview? What follows will try to reflect on specific aspects of the intimate relationship between populism and nationalism, the import of the conspiracist view of sociopolitical phenomena, and the overall “populist illusion” in the left-wing version of populism, with reference to the Greek experience of the past few years, notably through the Syriza phenomenon. To the extent possible, an effort will be made to examine this against the backdrop of a comparative approach to left-wing populism in general.