sychic Factors of Civilization._ Chap. ix, "The
Philosophy of Desire," pp. 50-58, chap. xviii, "The Social Forces," pp.
116-24. Boston, 1901.

(4) Small, Albion W. _General Sociology._ Chaps. xxvii and xxxi, pp.
372-94; 425-42. Chicago, 1905.

(5) Ross, Edward A. _The Principles of Sociology._ Part II, "Social
Forces," pp. 41-73. New York, 1920.

(6) Blackmar, F. W., and Gillin, J. L. _Outlines of Sociology._ Part
III, chap ii, "Social Forces," pp. 283-315. New York, 1915.

(7) Hayes, Edward C. "The 'Social Forces' Error," _American Journal of
Sociology_, XVI (1910-11), 613-25; 636-44.

(8) Fouillee, Alfred. _Education from a National Standpoint._ Translated
from the French by W. J. Greenstreet. Chap. i, pp. 10-27. New York,
1892.

(9) ----. _Morale des idees-forces._ 2d ed. Paris, 1908. [Book II, Part
II, chap. iii, pp. 290-311, describes opinion, custom, law, education
from the point of view of "Idea-Forces."]

B. _Interests and Wants as Defined by the Economist_

(1) Hermann, F. B. W. v. _Staatswirthschaftliche Untersuchungen._ Chap.
ii. Muenchen, 1870. [First of the modern attempts to classify wants.]

(2) Walker, F. A. _Political Economy._ 3d ed. New York, 1888. [See
discussion of competition, pp. 91-111.]

(3) Marshall, Alfred. _Principles of Economics._ An introductory volume.
Chap. ii, "Wants in Relation to Activities," pp. 86-91. 6th ed. London,
1910.

(4) ----. "Some Aspects of Competition," _Journal of the Royal
Statistical Society._ Sec. VII, "Modern Analysis of the Motives of
Business Competition," LIII (1890), 634-37. [See also Sec. VIII,
"Growing Importance of Public Opinion as an Economic Force," pp.
637-41.]

(5) Menger, Karl. _Grundsatze der Volkswirthschaftslehre._ Chap. ii,
Wien, 1871.

(6) ----. _Untersuchungen ueber die Methode der Socialwissenschaften und
der politischen Oekonomie insbesondere._ Chap. vii, "Ueber das Dogma,"
etc. Leipzig, 1883.

(7) Jevons, W. S. _The Theory of Political Economy._ Chap. ii, "Theory
of Pleasure and Pain," pp. 28-36; "The Laws of Human Wants," pp. 39-43.
4th ed. London, 1911.

(8) Bentham, Jeremy. "A Table of the Springs of Action." Showing the
several species of pleasures and pains of which man's nature is
susceptible; together with the several species of _interests_, _desires_
and _motives_ respectively corresponding to them; and the several sets
of appellatives, _neutral_, _eulogistic_, and _dyslogistic_, by which
each species of _motive_ i