Three Stages of Social Evolution: It is possible for us today to identify three main stages of the general evolution of human society. These are the primitive pre-class society, class society, and the classless society taking shape before us over a large area of the world. Such a broad division of social evolution is not intended, of course, to overlook the fact of uneven development of different peoples. Nor is it meant to ignore the sub-stages of the pre-class society and more particularly those of the class society. What nevertheless needs to be emphasized is that we are liable to miss something of basic significance about human society if we do not begin with these three main stages of social evolution.