“Those who claim to be Marxists cannot confine themselves to condemning or deploring political acts; they have also to explain them. Regrets and wishes may help the people to endure their woes, but they do not help them either to perceive their causes or to struggle to get rid of them or to prevent their reemergence. By explaining the reasons for something that does indeed deserve condemnation from the standpoint of the interests of the working people, we can contribute, however, to causing political forces to evolve in such a way that the "regrettable" events do not recur.”