[264] Cf. American Anthropologist, new series, vol. 1, 1899, p. 374.
It may be pointed out farther that, in the higher realms at least, the action normal to each realm tends to generate that characteristic of the next higher realm: the self-movement of the animal realm is, under favorable conditions, constrained through vital economy to fall into the conjustment of the social realm; and the organization of the social realm, involving as it does a hierarchic arrangement of organisms according to mentality,[265] habituates the higher individuals of the organizations to that control of lower individuals which buds in agriculture, blossoms in civil rule, and fruits in nature-conquest. Thus the factors of each realm are prophetic of the distinctive factor of the next higher—and the prophecy is not merely passive, but is, rather, an actual step in causal sequence.
[265] The spontaneous arrangement of organisms in accordance with mental grade is well illustrated by that solidarity of desert life which matures in the cultivation of plants and the investigation of animals (The Beginning of Agriculture, in The American Anthropologist, vol. VIII, October, 1895, pp. 350-375; The Beginning of Zooculture, ibid., vol. X, July 1897, pp. 215-230.)
It may be pointed out still further that, in the higher realms at least, spontaneous action necessarily precedes maturely developed function: in the vegetal realm the tree shoots upward before its form is shaped and its tissue textured by wind and sun and environing organisms; in the animal realm youthful play presages the prosaic performances normal to adult life; in the social realm men behave before framing laws of behavior; and in the rational realm fortuitous discovery paves the road for sure-footed invention. Thus natural initiative arises in spontaneous action, while mechanical action is mainly consequential.
It may be pointed out finally that the field of spontaneous action is relatively increased with the endless multiplications of action accompanying the passage from the lower realms to the higher—indeed the relations may be likened unto those of exogenous growth, which is largely withdrawn from the irresponsive and stable interior structures and gathered into the responsive and spontaneously active peripheral structures; so that spontaneous activity attending natural development is relatively more important in the higher stages than in the lower.[266]