Vol. III.

VII. Lingual Progress.—The evolution of Languages regarded as a psychological process determined by social conditions.

VIII. Intellectual Progress.—Treated from the same point of view: including the growth of classifications; the evolution of science out of common knowledge; the advance from qualitive to quantative prevision, from the indefinite to the definite, and from the concrete to the abstract.

IX. Æsthetic Progress.—The Fine Arts similarly dealt with: tracing their gradual differentiation from primitive institutions and from each other; their increasing varieties of development; and their advance in reality of expression and superiority of aim.

X. Moral Progress.—Exhibiting the genesis of the slow emotional modifications which human nature undergoes in its adaptation to the social state.

XI. The Consensus.—Treating of the necessary interdependence of structures and of functions in each type of society, and in the successive phases of social development.