“21. Together with the victory of the revolution, though, Marx’s fundamental error also became evident. He showed precisely how to overthrow the existing order, but he did not say how matters should proceed thereafter. He simply presumed that with the expropriation of the ruling class, with the fall of political power and the socialization of means of production, the new Jerusalem would be realized. Then, indeed, all contradictions would be resolved, humanity and the world would finally sort themselves out. Then everything would be able to proceed by itself along the right path, because everything would belong to everyone and all would desire the best for one another. Thus, having accomplished the revolution, Lenin must have realized that the writings of the master gave no indication as to how to proceed. True, Marx had spoken of the interim phase of the dictatorship of the proletariat as a necessity which in time would automatically become redundant. This “intermediate phase” we know all too well, and we also know how it then developed, not ushering in a perfect world, but leaving behind a trail of appalling destruction. Marx not only omitted to work out how this new world would be organized—which should, of course, have been unnecessary. His silence on this matter follows logically from his chosen approach. His error lay deeper. He forgot that we always remain human. He forgot humanity and he forgot human freedom. He forgot that freedom always remains also freedom for evil. He thought that once the economy had been put right, everything would automatically be put right. His real error is materialism: we, in fact, are not merely the product of economic conditions, and it is not possible to redeem us purely from the outside by creating a favourable economic environment.
24. Let us ask once again: what may we hope? And what may we not hope? First of all, we must acknowledge that incremental progress is possible only in the material sphere. Here, amid our growing knowledge of the structure of matter and in the light of ever more advanced inventions, we clearly see continuous progress towards an ever greater mastery of nature. Yet in the field of ethical awareness and moral decision-making, there is no similar possibility of accumulation for the simple reason that human freedom is always new and we must always make decisions anew. These decisions can never simply be made for us in advance by others—if that were the case, we would no longer be free. Freedom presupposes that in fundamental decisions, every person and every generation is a new beginning. Naturally, new generations can build on the knowledge and experience of those who went before, and they can draw upon the moral treasury of the whole of humanity. But they can also reject it, because it can never be self-evident in the same way as material inventions. The moral treasury of humanity is not readily at hand like tools that we use; it is present as an appeal to freedom and a possibility for it. This, however, means that:
a) The right state of human affairs, the moral well-being of the world can never be guaranteed simply through structures alone, however good they are. Such structures are not only important, but necessary; yet they cannot and must not marginalize human freedom. Even the best structures function only when the community is animated by convictions capable of motivating people to assent freely to the social order. Freedom requires conviction; conviction does not exist on its own, but must always be gained anew by the community.
b) Since we always remain free and since our freedom is always fragile, the kingdom of good will never be definitively established in this world. Anyone who promises the better world that is guaranteed to last for ever is making a false promise; they are overlooking human freedom. Freedom must constantly be won over for the cause of good. Free assent to the good never exists simply by itself. If there were structures which could irrevocably guarantee a determined—good—state of the world, human freedom would be denied, and hence they would not be good structures at all.
25. What this means is that every generation has the task of engaging anew in the arduous search for the right way to order human affairs; this task is never simply completed. Yet every generation must also make its own contribution to establishing convincing structures of freedom and of good, which can help the following generation as a guideline for the proper use of human freedom; hence, always within human limits, they provide a certain guarantee also for the future. In other words: good structures help, but of themselves they are not enough. Humanity can never be redeemed simply from outside.”
Benedict XVI, Spe Salvi, 2007.