Nothing more complicated today than to navigate between all the labels pasted dishonestly by journalists to the various political groups. At a time when the Party "Socialist" passing laws to legalize Sunday work, where the prime minister is applauded wildly by MEDEF, it was urgent to reaffirm the true identity of the left. This is done with this book by Jean-Claude Michéa. Religious wars that have bloodied the sixteenth century to the Liberal turning Mitterrand in 1983, Michéa explains the history of modern political ideas and philosophical foundations. It attempts to describe minutely the history of thought and the history of socialism. For him socialism is not the same before and after the Dreyfus affair. Indeed, the Reds (communists and anarchists) were separated Blues (left liberal, commercial bourgeoisie) before the Dreyfus affair. Then these two trends will merge in what is called the "camp of progress." But all socialist philosophers did not follow this line. Including one who is a mentor of Michéa: George Orwell. He introduced the concept of common decency (plain decency) that would all sound moral values, built on the anthropology of the gift and the triptych "giving, receiving, returning" shared by "ordinary people". He criticizes the idea of Progress continued by all the liberal right and left alike. This new religion (Progress) is for him, one of the major tools of liberal capitalism to achieve his ends. Of course, we are talking about essentially the critique of technical progress, which should not be a criterion for measuring the degree of satisfaction of a population in a given society. It rehabilitates whole current of socialism that has bad press today with the huge army of state sociologists, worldly journalists, éditocrates and experts who swarm in the media. Genuine socialism based on the entrenchment of social struggles in local popular culture. The one where the class struggle concerned the proletariat in its entirety. A thousand miles so stupid fights new current leftists who "fight" them against all forms of specific discrimination (racism, homophobia, gender theory, self-learning at school ...). Imagine there is now a LGBT activist Marx? Lenin joining SOS Racism? A Louise Michel attending the Gay Pride? It would be highly absurd ... It is here that we see the terribly negative influence of the theories of French Theory of Foucaulr or Deleuze misery of modern leftist philosophy ... Should we then surprising that the popular classes have deserted the Left parties. The immigrationnisme, the non-papiérisme, the non-frontiérisme have established themselves as the new values. Values that the rest are fully approved by the advocates of ultraliberal globalization that did not ask much. The bourgeois cosmopolitanism colonized the left, who would have thought? This is briefly summarized some of the content of the book. It includes of course developments on a bunch of subjects that can not be addressed here. I will say that the books are Michéa capital that wants to reconnect with the thought of genuine left and not just of leftism Inrocks or Canal Plus. Reading Christopher Lasch including his book "The only paradise" is an indispensable complement to Michéa.