"The current volume eloquently and persuasively charts the evolution of the intellectual ideas that animated the "political religions" (p. 5) of the totalitarian systems of the twentieth century . . . Gregor's argument is deployed step-by-step and chronologically through two centuries of intellectual thought in measured and accretive fashion . . . This is must reading for anyone interested in modern European history, modern authoritarian systems, and the intellectual roots of the carnage of the last century."—Frederick C. Corney, Canadian-American Slavic Studies "A. James Gregor has, for half a century, been one of the major makers and shapers of the discipline of comparative fascism . . . Gregor has produced an engaging, thoughtful, and very readable interpretation of the emergence and rise of Marxism, Leninism, fascism, Nazism, Maoism, and the ideology of the Khmer Rouge . . . Rich in detail, this book can be wholeheartedly recommended to anybody interested in the history of modern radically anti-liberal thought, and those ideologies that informed human history's most murderous regimes."—Andreas Umland, American Historical Review "A. James Gregor is indisputably the foremost authority on totalitarian philosophy and practice in the English-speaking world (at least). This magisterial book will add to that reputation: there are few scholars, if any, who could produce a work of such panoramic sweep. Further, Gregor makes the most imaginative linkages between ideas and phenomena that previously might have seemed unrelated. His provocative insights will attract much attention."—Anthony James Joes, Saint Joseph's University "In this impressive work of scholarship A. James Gregor shows that the totalitarian twins, communism and fascism, are not at all what they claim to be—secular and atheistic ideologies—but thinly disguised 'political religions' arising from their common source in the militant intellectual milieu that Marxism engendered."—Carl Linden, Emeritus, The George Washington University