None of these men could discuss the matter from the proletarian point of view. For in order to do this, it is necessary to descend from the hills of class assumption into the valley of proletarian class-consciousness. This consciousness and the socialist mind are born together. The key to the philosophy of capitalism is the philosophy of socialism. With the rays of this searchlight, Engels exposed the pious "deceivers," property and the state, and their "lofty" ideal, covetousness. And the monogamic family, so far from being a divinely instituted "union of souls," is seen to be the product of a series of material and, in the last analysis, of the most sordid motives. But the ethics of property are worthy of a system of production that, in its final stage, shuts the overwhelming mass of longing humanity out from the happiness of home and family life, from all evolution to a higher individuality, and even drives progress back and forces millions of human beings into irrevocable degeneration. The desire for a higher life cannot awake in a man, until he is thoroughly convinced that his present life is ugly, low, and capable of improvement by himself. The present little volume is especially adapted to assist the exploited of both sexes in recognizing the actual causes which brought about their present condition. By opening the eyes of the deluded throng and reducing the vaporings of their ignorant or selfish would-be leaders in politics and education to sober reality, it will show the way out of the darkness and mazes of slavish traditions into the light and freedom of a fuller life on earth. These are the reasons for introducing this little volume to English speaking readers. Without any further apology, we leave them to its perusal and to their own conclusions. ERNEST UNTERMANN. Chicago, August, 1902. AUTHOR'S PREFACE TO THE FIRST EDITION, 1884. The following chapters are, in a certain sense, executing a bequest. It was no less a man than Karl Marx who had reserved to himself the privilege of displaying the results of Morgan's investigations in connection with his own materialistic conception of history--which I might call ours within certain limits. He wished thus to elucidate the full meaning of this conception. For in America, Morgan had, in a manner, discovered anew the materialistic conception of history, originated by Marx forty years ago. In comparing barbarism and civilization, he had arrived, in the main, at the same results as Marx. And just as "Capital" was zealously plagiarized and persistently passed over in silence by the professional economists in Germany, so Morgan's "Ancient Society"[1] was treated by the spokesmen of "prehistoric" science in England. My work can offer only a meager substitute for that which my departed friend was not destined to accomplish. But in his copious extracts from Morgan, I have critical notes which I herewith reproduce as fully as feasible.