Cas Mudde’s book on Syriza’s “failure of populist promises,” which recently appeared in Greek, lends itself to multiple, successive readings of the current Greek populist experience in a comparative setting. One of the leading political scientists currently researching the populist phenomenon in both its radical-right and radical-left varieties, Mudde combines thorough knowledge of his subject matter’s ideological premises with a thorough analysis of his factual material, namely, the empirical cases he sets out to investigate. Indeed, it is to Mudde that we owe the term “pathological normalcy,” denoting the current form of radical-right populism in Europe. Mudde has used this term to explain the phenomenon of “mainstream thought” radicalization employed by the “populist radical right” with a view to exploiting a social and identitarian malaise that is widespread in several European countries. It is also to Mudde that we owe a number of thought-provoking and, in many respects, pioneering comparative studies (many of them co-authored or co-edited with his fellow political scientist Cristόbal Rovira Kaltwasser) about the differences between European and Latin-American populisms, in which Mudde demonstrates the latter’s rather inclusionary practices as opposed to the former’s rather exclusionary ones. Moreover, we owe him a very insightful discussion of the different outcomes produced when populist political parties come to power.