Erich Fromm 1961
Marx's concept of socialism follows from his concept of man. It should be clear by now that according to this concept, socialism is not a society of regimented, automatized individuals, regardless of whether there is equality of income or not, and regardless of whether they are well fed and well clad. It is not a society in which the individual is subordinated to the state, to the machine, to the bureaucracy. Even if the state as an "abstract capitalist" were the employer, even if "the entire social capital were united in the hands either of a single capitalist or a single capitalist corporation,"  this would not be socialism. In fact, as Marx says quite clearly in the Economic and Philosophical Manuscripts, "communism as such is not the aim of human development." What, then, is the aim?
Quite clearly the aim of socialism is man. It is to create a form of production and an organization of society in which man can overcome alienation from his product, from his work, from his fellow man, from himself and from nature; in which he can return to himself and grasp the world with his own powers, thus becoming one with the world. Socialism for Marx was, as Paul Tillich put it, "a resistance movement against the destruction of love in social reality." 
Marx expressed the aim of socialism with great clarity at the end of the third volume of Capital: "In fact, the realm of freedom does not commence until the point is passed where labor under the compulsion of necessity and of external utility is required. In the very nature of things it lies beyond the sphere of material production in the strict meaning of the term. Just as the savage must wrestle with nature, in order to satisfy his wants, in order to maintain his life and reproduce it, so civilized man has to do it, and he must do it in all forms of society and under all possible modes of production. With his development the realm of natural necessity expands, because his wants increase; but at the same time the forces of production increase, by which these wants are satisfied. The freedom in this field cannot consist of anything else but of the fact that socialized man, the associated producers, regulate their interchange with nature rationally, bring it under their common control, instead of being ruled by it as by some blind power; they accomplish their task with the least expenditure of energy and under conditions most adequate to their human nature and most worthy of it. But it always remains a realm of necessity. Beyond it begins that development of human power, which is its own end, the true realm of freedom, which, however, can flourish only upon that realm of necessity as its basis." 
Marx expresses here all essential elements of socialism. First, man produces in an associated, not competitive way; he produces rationally and in an unalienated way, which means that he brings production under his control, instead of being ruled by it as by some blind power. This clearly excludes a concept of socialism in which man is manipulated by a bureaucracy, even if this bureaucracy rules the whole state economy, rather than only a big corporation. It means that the individual participates actively in the planning and in the execution of the plans; it means, in short, the realization of political and industrial democracy. Marx expected that by this new form of an unalienated society man would become independent, stand on his own feet, and would no longer be crippled by the alienated mode of production and consumption; that he would truly be the master and the creator of his life, and hence that he could begin to make living his main business, rather than producing the means for living. Socialism, for Marx, was never as such the fulfillment of life, but the condition for such fulfillment. When man has built a rational, nonalienated form of society, he will have the chance to begin with what is the aim of life: the "development of human power, which is its own end, the true realm of freedom." Marx, the man who every year read all the works of Aeschylus and Shakespeare, who brought to life in himself the greatest works of human thought, would never have dreamt that his idea of socialism could be interpreted as having as its aim the well-fed and well-clad "welfare" or "workers' " state. Man, in Marx's view, has created in the course of history a culture which he will be free to make his own when he is freed from the chains, not only of economic poverty, but of the spiritual poverty created by alienation. Marx's vision is based on his faith in man, in the inherent and real potentialities of the essence of man which have developed in history. He looked at socialism as the condition of human freedom and creativity, not as in itself constituting the goal of man's life.
For Marx, socialism (or communism) is not flight or abstraction from, or loss of the objective world which men have created by the objectification of their faculties. It is not an impoverished return to unnatural, primitive simplicity. It is rather the first real emergence, the genuine actualization of man's nature as something real. Socialism, for Marx, is a society which permits the actualization of man's essence, by overcoming his alienation. It is nothing less than creating the conditions for the truly free, rational, active and independent man; it is the fulfillment of the prophetic aim: the destruction of the idols.
That Marx could be regarded as an enemy of freedom was made possible only by the fantastic fraud of Stalin in presuming to talk in the name of Marx, combined with the fantastic ignorance about Marx that exists in the Western world. For Marx, the aim of socialism was freedom, but freedom in a much more radical sense than the existing democracy conceives of it-freedom in the sense of independence, which is based on man's standing on his own feet, using his own powers and relating himself to the world productively. "Freedom," said Marx, "is so much the essence of man that even its opponents realize it.... No man fights freedom; he fights at most the freedom of others. Every kind of freedom has therefore always existed, only at one time as a special privilege, another time as a universal right." 
Socialism, for Marx, is a society which serves the needs of man. But, many will ask, is not that exactly what modern capitalism does? Are not our big corporations most eager to serve the needs of man? And are the big advertising companies not reconnaissance parties which, by means of great efforts, from surveys to "motivation analysis," try to find out what the needs of man are? Indeed, one can understand the concept of socialism only if one understands Marx's distinction between the true needs of man, and the synthetic, artificially produced needs of man.
As follows from the whole concept of man, his real needs are rooted in his nature; this distinction between real and false needs is possible only on the basis of a picture of the nature of man and the true human needs rooted in his nature. Man's true needs are those whose fulfillment is necessary for the realization of his essence as a human being. As Marx put it: "The existence of what I truly love is felt by me as a necessity, as a need, without which my essence cannot be fulfilled, satisfied, complete."  Only on the basis of a specific concept of man's nature can Marx make the difference between true and false needs of man. Purely subjectively, the false needs are experienced as being as urgent and real as the true needs, and from a purely subjective viewpoint, there could not be a criterion for the distinction. (In modern terminology one might differentiate between neurotic and rational [healthy] needs).  Often man is conscious only of his false needs and unconscious of his real ones. The task of the analyst of society is precisely to awaken man so that he can become aware of the illusory false needs and of the reality of his true needs. The principal goal of socialism, for Marx, is the recognition and realization of man's true needs, which will be possible only when production serves man, and capital ceases to create and exploit the false needs of man.
Marx's concept of socialism is a protest, as is all existentialist philosophy, against the alienation of man; if, as Aldous Huxley put it, "our present economic, social and international arrangements are based, in large measure, upon organized lovelessness,"  then Marx's socialism is a protest against this very lovelessness, against man's exploitation of man, and against his exploitativeness towards nature, the wasting of our natural resources at the expense of the majority of men today, and more so of the generations to come. The unalienated man, who is the goal of socialism as we have shown before, is the man who does not "dominate" nature, but who becomes one with it, who is alive and responsive toward objects, so that objects come to life for him.
Does not all this mean that Marx's socialism is the realization of the deepest religious impulses common to the great humanistic religions of the past? Indeed it does, provided we understand that Marx, like Hegel and like many others, expresses his concern for man's soul, not in theistic, but in philosophical language.
Marx fought against religion exactly because it is alienated, and does not satisfy the true needs of man. Marx's fight against God is, in reality, a fight against the idol that is called God. Already as a young man he wrote as the motto for his dissertation "Not those are godless who have contempt for the gods of the masses but those who attribute the opinions of the masses to the gods." Marx's atheism is the most advanced form of rational mysticism, closer to Meister Eckhart or to Zen Buddhism than are most of those fighters for God and religion who accuse him of "godlessness."
It is hardly possible to talk about Marx's attitude toward religion without mentioning the connection between his philosophy of history, and of socialism, with the Messianic hope of the Old Testament prophets and the spiritual roots of humanism in Greek and Roman thinking. The Messianic hope is, indeed, a feature unique in Occidental thought. The prophets of the Old Testament are not only, like Lao Tzu or Buddha, spiritual leaders; they are also political leaders. They show man a vision of how he ought to be, and confront him with the alternatives between which he must choose. Most of the Old Testament prophets share the idea that history has a meaning, that man perfects himself in the process of history, and that he will eventually create a social order of peace and justice. But peace and justice for the prophets do not mean the absence of war and the absence of injustice. Peace and justice are concepts which are rooted in the whole of the Old Testament concept of man. Man, before he has consciousness of himself, that is, before he is human, lives in unity with nature ( Adam and Eve in Paradise). The first act of Freedom, which is the capacity to say "no," opens his eyes, and he sees himself as a stranger in the world, beset by conflicts with nature, between man and man, between man and woman. The process of history is the process by which man develops his specifically human qualities, his powers of love and understanding; and once he has achieved full humanity he can return to the lost unity between himself and the world. This new unity, however, is different from the preconscious one which existed before history began. It is the at-onement of man with himself, with nature, and with his fellow man, based on the fact that man has given birth to himself in the historical process. In Old Testament thought, God is revealed in history ("the God of Abraham, the God of Isaac, the God of Jacob"), and in history, not in a state transcending history, lies the salvation of man. This means that man's spiritual aims are inseparably connected with the transformation of society; politics is basically not a realm that can be divorced from that of moral values and of man's self-realization.
Related thoughts arose in Greek (and Hellenistic) and Roman thinking. From Zeno, the founder of Stoic philosophy, to Seneca and Cicero, the concepts of natural law and of the equality of man exercised a powerful influence on the minds of men and, together with the prophetic tradition, are the foundations of Christian thinking.
While Christianity, especially since Paul, tended to transform the historical concept of salvation into an "other-worldly," purely spiritual one, and while the Church became the substitute for the "good society," this transformation was by no means a complete one. The early Church fathers express a radical criticism of the existing state; Christian thought of the late Middle Ages criticizes secular authority and the state from the standpoint of divine and natural law. This viewpoint stresses that society and the state must not be divorced from the spiritual values rooted in revelation and reason ("intellect" in the scholastic meaning of the word). Beyond this, the Messianic idea was expressed even in more radical forms in the Christian sects before the Reformation, and in the thinking of many Christian groups after the Reformation, down to the Society of Friends of the present time.
The mainstream of Messianic thinking after the Reformation, however, was expressed no longer in religious thought, but in philosophical, historical and social thought. It was expressed somewhat obliquely in the great utopias of the Renaissance, in which the new world is not in a distant future, but in a distant place. It was expressed in the thinking of the philosophers of the enlightenment and of the French and English Revolutions. It found its latest and most complete expression in Marx's concept of socialism. Whatever direct influence Old Testament thinking might have had on him through socialists like Moses Hess, no doubt the prophetic Messianic tradition influenced him indirectly through the thought of the enlightenment philosophers and especially through the thought stemming from Spinoza, Goethe, Hegel. What is common to prophetic, thirteenth-century Christian thought, eighteenth-century enlightenment,  and nineteenth-century socialism, is the idea that State (society) and spiritual values cannot be divorced from each other; that politics and moral values are indivisible. This idea was attacked by the secular concepts of the Renaissance ( Machiavelli) and again by the secularism of the modern state. It seems that Western man, whenever he was under the influence of gigantic material conquests, gave himself unrestrictedly to the new powers he had acquired and, drunk with these new powers, forgot himself. The elite of these societies became obsessed with the wish for power, luxury, and the manipulation of men, and the masses followed them. This happened in the Renaissance with its new science, the discovery of the globe, the prosperous City States of Northern Italy; it happened again in the explosive development of the first and the present second industrial revolutions.
But this development has been complicated by the presence of another factor. If the state or the society is meant to serve the realization of certain spiritual values, the danger exists that a supreme authority tells man -and forces him -- to think and behave in a certain way. The incorporation of certain objectively valid values into social life tends to produce authoritarianism. The spiritual authority of the Middle Ages was the Catholic Church. Protestantism fought this authority, at first promising greater independence for the individual, only to make the princely state the undisputed and arbitrary ruler of man's body and soul. The rebellion against princely authority occurred in the name of the nation, and for a while the national state promised to be the representative of freedom. But soon the national state devoted itself to the protection of the material interests of those who owned capital, and could thus exploit the labor of the majority of the population. Certain classes of society protested against this new authoritarianism and insisted on the freedom of the individual from the interference of secular authority. This postulate of liberalism, which tended to protect "freedom from," led, on the other hand, to the insistence that state and society must not attempt to realize "freedom to," that is to say, liberalism had to insist not only on separation from State and Church, but had also to deny that it was the function of the state to help realize certain spiritual and moral values; these values were supposed to be entirely a matter for the individual.
Socialism (in its Marxist and other forms) returned to the idea of the "good society" as the condition for the realization of man's spiritual needs. It was antiauthoritarian, both as far as the Church and the State are concerned, hence it aimed at the eventual disappearance of the state and at the establishment of a society composed of voluntarily cooperating individuals. Its aim was a reconstruction of society in such a way as to make it the basis for man's true return to himself, without the presence of those authoritarian forces which restricted and impoverished man's mind.
Thus, Marxist and other forms of socialism are the heirs of prophetic Messianism, Christian Chiliastic sectarianism, thirteenth-century Thomism, Renaissance Utopianism, and eighteenth-century enlightenment.  It is the synthesis of the prophetic-Christian idea of society as the plane of spiritual realization, and of the idea of individual freedom. For this reason, it is opposed to the Church because of its restriction of the mind, and to liberalism because of its separation of society and moral values. It is opposed to Stalinism and Krushchevism, for their authoritarianism as much as their neglect of humanist values.
Socialism is the abolition of human self-alienation, the return of man as a real human being. "It is the definitive resolution of the antagonism between man and nature, and between man and man. It is the true solution of the conflict between existence and essence, be tween objectification and self-affirmation, between freedom and necessity, between individual and species. It is a solution of the riddle of history and knows itself to be this solution". ,  For Marx, socialism meant the social order which permits the return of man to himself, the identity between existence and essence, the overcoming of the separateness and antagonism between subject and object, the humanization of nature; it meant a world in which man is no longer a stranger among strangers, but is in his world, where he is at home.