over the outer unities of mode of life are reflected by inner communities of thought; for there are unmistakable kinships of idea, not only throughout the civilized group, but also in the whole range of the regions affected by its arts; while underlying these and outcropping at the poles, there is a definable stratum of virtually identical primitive thought. Nevertheless, these unities are cut across by differences, partly environmental and partly historical in origin, which give, as said above, distinctive character to the parallel groups of the two continents. One might, indeed, say that the cultural division is twinned, north and south,—with a certain primacy, as of elder birth and clear superiority in the northern groups; for, on the whole, the Maya is superior to the Inca, just as the Iroquois and Sioux are superior to Carib and Araucanian, and the Eskimo to the Fueglan.
Such, in loose form, is the native configuration of American culture and hence of native American thought, and without question a desirable mode of treating the latter would be to follow this natural chart. Nevertheless, there are reasons which fully justify, in the study of native ideas, the bringing together in a single treatment of all the materials relating to the peoples of Latin America. The most obvious of these reasons is the unity of the descriptive literature. In its earlier and primary works almost wholly Spanish. It is not merely that such writers as Las Casas, Acosta, Herrera, and Gómara pass ubiquitously from region to region of the Spanish conquests, now north, now south, in the course of their narratives; it is rather that a certain colouristic harmony is derived from what might be termed the linguistic prejudices of their tongue, which, therefore, they share with those Spanish chroniclers whose field of description is limited to some one region. The mere fact that the ideas of an Indian nation are first described by a sixteenth century Spaniard—friar, bishop, or cavalier—gives to them the flavour of their translation and context, and thus establishes a sort of community between all groups of ideas so de-
