How is the evolutionary nature of the development of society expressed?

We can say that the evolutionary nature of the development of society is expressed in the distribution of labor. The society is so huge that there must be certain professional niches in it. There were no such niches before. One person could engage in various activities, but proper skill was not observed. Now, each person is a professional in a particular business. He is engaged in an activity that he is good at and benefits the whole society.