The author discusses thinkers who have shaped contemporary understanding of totalitarian movements—people such as Hannah Arendt, Raymond Aron, Isaiah Berlin, Albert Camus, François Furet, Tony Judt, Ian Kershaw, Leszek Kolakowski, Richard Pipes, and Robert C. Tucker. As much a theoretical analysis of the practical philosophies of Marxism-Leninism and Fascism as it is a political biography of particular figures, this book deals with the incarnation of diabolically nihilistic principles of human subjugation and conditioning in the name of presumably pure and purifying goals. Ultimately, the author claims that no ideological commitment, no matter how absorbing, should ever prevail over the sanctity of human life. He comes to the conclusion that no party, movement, or leader holds the right to dictate to the followers to renounce their critical faculties and to embrace a pseudo-miraculous, a mystically self-centered, delusional vision of mandatory happiness.