beast-stage, or lowest man-stage up to its present condition. Assuming a tropical, sea-level condi-
tion as that best suited for first development, it may fairly be concluded that the inhabitants of relatively high altitudes and high latitudes have passed through a relatively wide range of ancestral experiences, and hence carry with them to their modern and difficult seats an average temperament resulting from widely varied influences. Thus, in the most central marrow of his bones, in the most hidden promptings of his soul, the Tibetan may be urged by secret influence from the sun-heated slime of the Euphrates delta, from the salty breath of Aral plains, from the freezing winds of Siberian forest, from the heavy exhalation of Indian jungle. However composite he may have been when first he wrestled with niggard nature in the Tsang-po valley and its even less hospitable neighbour-lands, he has, since that time, been singularly free from miscegenation, and has had time to develop a type strongly marked by the very special conditions which surround him. A similar isolation may be noted of peoples in the far north, of the Arab in his inaccessible deserts, of the Abyssinian in the northern part of his high plateau, of the Chinaman in the core of his valley empire, of the African pigmy in his undesired forests.
Unique physical features have, in each case, developed unique human traits, which shall be found ineradicable within periods of ordinary historical view. The process of "benevolent assimilation" may then wisely be restricted to the control of external relations and the introduction, slowly, of
IIIF Color HighRes
