44   HISTORIC GROWTH OF MAN.

units, that is, of persons. Collective action all comes from the faculties of individuals who make up the aggregate. We know from the old Egyptian mummies that man has now exactly the same number of faculties, exactly the same kind, that he had four thousand years ago. They are simply developed to a higher degree, that is all. In other words, the constitution of man remains permanent in its form and its parts. The science of man, with its branches in mental science and sociology, can show us a constitution of society which will be equally permanent in its forms, and yet will admit of continuous growth and social expansion. It will carry out all the laws in the nature of man and thus secure the conditions of universal happiness for the race.

Social Structures.