"Marriage and the family are the foundation of the State; consequently, he who attacks marriage and the family attacks society and the State, and undermines both"--thus cry the defenders of the present order. Unquestionably, monogamous marriage, which flows from the bourgeois system of production and property, is one of the most important cornerstones of bourgeois or capitalist society; whether, however, such marriage is in accord with natural wants and with a healthy development of human society, is another question. We shall prove that the marriage, founded upon bourgeois property relations, is more or less a marriage by compulsion, which leads numerous ills in its train, and which fails in its purpose quite extensively, if not altogether. We shall show, furthermore, that it is a social institution, beyond the reach of millions, and is by no means that marriage based upon love, which alone corresponds with the natural purpose, as its praise-singers maintain. With regard to modern marriage, John Stuart Mill exclaims: "_Marriage is the only form of slavery that the law recognizes._" In the opinion of Kant, man and woman constitute only jointly the full being. Upon the normal union of the sexes rests the healthy development of the human race. The natural gratification of the sexual instinct is a necessity for the thorough physical and mental development of both man and woman. But man is no animal. Mere physical satisfaction does not suffice for the full gratification of his energetic and vehement instinct. He requires also spiritual affinity and oneness with the being that he couples with. Is that not the case, then the blending of the sexes is a purely mechanical act: such a marriage is immoral. It does not answer the higher human demands. Only in the mutual attachment of two beings of opposite sexes can be conceived the spiritual ennobling of relations that rest upon purely physical laws. Civilized man demands that the mutual attraction continue beyond the accomplishment of the sexual act, and _that it prolong its purifying influence upon the home that flows from the mutual union_.[65] The fact that these demands can not be made upon numberless marriages in modern society is what led Barnhagen von Ense to say: "That which we saw with our own eyes, both with regard to contracted marriages and marriages yet to be contracted, was not calculated to give us a good opinion of such unions. On the contrary, the whole institution, which was to have only love and respect for its foundation, and which in all these instances (in Berlin) we saw founded on everything but that, seemed to us mean and contemptible, and we loudly joined in the saying of Frederick Schlegel which we read in the fragments of the 'Atheneum': Almost all marriages are concubinages, left-handed unions, or rather provisional attempts and distant resemblances at and of a true marriage, whose real feature consists,