same capacity to sacrifice, which undifferentiated epochs and persons associate only with a community of the total circumference of life, with no question about reserves and discretions.
Much more difficult is measurement of self-revelation and reserve, with their correlates intrusiveness and discretion, in the case of marriage. In this relationship these forms are among the universal problems of the highest importance for the sociology of intimate associations. We are confronted with the questions, whether the maximum of reciprocality is attained in a relationship in which the personalities entirely resign to each other their separate existence, or quite the contrary, through a certain reserve—whether they do not in a certain qualitative way belong to each other more if they belong to each other less quantitatively. These questions of ratio can of course, at the outset, be answered only with the further question: How is the boundary to be drawn, within the whole area of a person’s potential communicability, at which ultimately the reserve and the respect of another are to begin? The advantage of modern marriage—which, to be sure, makes both questions answerable only one case at a time—is that this boundary is not from the start determined, as was the case in earlier civilizations. In these other civilizations marriage is, in principle, as a rule, not an erotic phenomenon, but merely a social-economic institution. The satisfaction of the instincts of love is only accidentally connected with it. With certain exceptions, the marriage is not on grounds of individual attraction, but rather of family policy, labor relationships, or desire for descendants. The Greeks, for example, carried this institution to the most extreme differentiation. Thus Demosthenes said: “We have hetaerae for our pleasure, concubines for our daily needs, but wives to give us lawful children and to care for the interior of the house.” The same tendency to exclude from the community of marriage, a priori, certain defined life-contents, and by means of super-individual provisions, appears in the variations in the forms of marriage to be found in one and the same people, with possibility of choice in advance on the part of those contracting marriages. These forms are differentiated in various ways with reference to the economic, religious, legal,
