Egypt, which, by its records and remains, exhibits so well the early phases of social progress, shows us how at first various governmental functions, including the professional, were mingled in the king and in the cluster of those who surrounded the king. [Footnote 44: From Volume III of "The Principles of Sociology." Copyright, 1896, by D. Appleton & Co.] No group of institutions illustrates with greater clearness the process of social evolution; and none shows more undeniably how social evolution conforms to the law of evolution at large. The germs out of which the professional agencies arise, forming at first a part of the regulative agency, differentiate from it at the same time that they differentiate from one another; and while severally being rendered more multiform by the rise of subdivisions, severally become more coherent within themselves and more definitely marked off. The process parallels completely that by which the parts of an individual organism pass from their initial state of simplicity to their ultimate state of complexity. Originally one who was believed by himself and others to have power over demons--the mystery-man or medicine-man--using coercive methods to expel disease-producing spirits, stood in the place of doctor; and when his appliances, at first supposed to act supernaturally, came to be understood as acting naturally, his office eventually lost its priestly character altogether: the resulting physician class, originally uniform, eventually dividing into distinguishable subclasses while acquiring a definite embodiment. Less early, because implying more developed groups, arose those who as exhibitors of joy, now in the presence of the living ruler and now in the supposed presence of the deceased ruler, were at first simultaneously singers and dancers, and, becoming specialized from the people at large, presently became distinct from one another; whence, in course of time, two groups of professionals, whose official laudations, political or religious, extended in their range and multiplied in their kinds. And then by like steps were separated from one another vocal and instrumental musicians, and eventually composers; within which classes also there arose subdivisions.