The basis of Simpson's unity is color and colonial subjection. His color chart recognizes a spectrum of black, brown and yellow, which at the time had been traditional since the late 19th century. Apart from these was "the great white race", which the moderate Simpson tones down to simply the white race. The great whites were appearing as late as the 1920s works of James Henry Breasted, which were taught as the gospel of ancient history throughout the entire first half of the 20th century. A red wavelength was mainly of interest in America. The eastern question was modified by Simpson to "The Problem of the Nearer East," which had nothing to do with the Ottomans but everything to do with British colonialism. Simpson wrote of the white man:

What is the basis of Simpson's unity?