Changes, numerical, social, organic, must by their mutual influences work unceasingly towards a state of harmony—a state in which each of the factors is just equal to its work. And this highest conceivable result must be wrought out by the same universal process which the simplest inorganic action illustrates.
"Principles of Sociology" was published in four parts from 1876 to 1880. It forms part of a connected series. In "First Principles" inorganic evolution—that of the stars and of the solar system—was outlined; organic evolution was dealt with in "Principles of Biology;" and in the present treatise, "Principles of Sociology," we approach super-organic evolution, and are introduced to the science of society under its Comtist title "Sociology."
Super-organic evolution may be marked off from, organic by taking it to include all those processes and products which imply the co-ordinated action of many individuals. Commencing with the development of the family, sociology has next to describe and explain the rise and development of political organisation; the evolution of the ecclesiastical structures and functions; the control embodied in ceremonial observances; and the relations between the regulative and operative divisions of every society.
I.—Domestic
That evolution decreases the sacrifice of individual life to the life of the species, we may see on glancing upwards from the microscopic protozoa, where the brief parental life disappears absolutely in the lives of the progeny, to the mammalia, where the greatest conciliation of the interests of the species, the parents and the young, is displayed. The highest constitution of the family is reached where there is such conciliation between the needs of the society and those of its members, old and young, that the mortality between birth and the reproductive age falls to a minimum, while the lives of adults have their subordination to the rearing of children reduced to the smallest possible. The diminution of this subordination takes place in three ways: First, by elongation of that period which precedes reproduction; second, by fewer offspring born, as well as by increase of the pleasure taken in the care of them; and third, by lengthening of the life which follows cessation of reproduction. Let us bear in mind that the domestic relations which are ethically the highest, are also biologically and sociologically the highest.
MARRIAGE
The propriety of setting out with the foregoing purely natural-history view will be evident upon learning that among low savages the relations of the sexes are substantially like those common among inferior creatures. The effect of promiscuity, however, being to hinder social evolution, wherever it was accompanied by unions having some duration, the product of such unions were likely to be superior to others, and from this primitive stage domestic evolution takes place in several directions by increase of coherence and definiteness.
From promiscuity we pass to that form of polyandry in which the unrelated husbands have but one wife; thence to the form in which the husbands are related; and finally to the form in which they are brothers only, as in the fraternal polyandry of the ancient Britons. It is almost needless to point out that, as in passing from promiscuity to polyandry the domestic relations become more coherent and definite, so do they in passing from the lower forms of polyandry to the higher. That polygyny is better than polyandry may be concluded from its effects. It conduces in a higher degree to social self-preservation than the inferioi types of marital relations by making possible more rapid replacement of men lost in war, and so increases the chance of social survival. By establishment of descent in the male line it conduces to political stability; and, by making possible a developed form of ancestor-worship, it consolidates society.