It was natural that under a dynasty of Semites, Semitic blood should flow freely into the lower region, Semitic usages and modes of thought become prevalent, and the spoken language of the country pass from a Turanian or Turano-Cushite to a Semitic type.

The previous Chaldaean race blended, apparently, with the new comers, and people was produced in which the three elements--the Semitic, the Turanian, and the Cushite--held about equal shares.

The colonization of the Sargonid kings added probably other elements in small proportions, and the result was that among all the nations inhabiting Western Asia there can have been none so thoroughly deserving the title of a "mingled people" as the Babylonians of the later Empire.
In mixtures of this kind it is almost always found that some one element practically preponderates, and assumes to itself the right of fashioning and forming the general character of the race.

It is not at all necessary that this formative element should be larger than any other; on the contrary, it may be and sometimes is extremely small; for it does not work by its mass, but by its innate force and strong vital energy.
In Babylonia, the element which showed itself to possess this superior vitality, which practically asserted its pre-eminence and proceeded to mold the national character, was the Semitic.

There is abundant evidence that by the time of the later Empire the Babylonians had become thoroughly Semitized; so much so, that ordinary observers scarcely distinguished them from their purely Semitic neighbors, the Assyrians.
No doubt there were differences which a Hippocrates or an Aristotle could have detected--differences resulting from mixed descent, as well as differences arising from climate and physical geography; but, speaking broadly, it must be said that the Semitic element, introduced into Babylonia from the north, had so prevailed by the time of the establishment of the Empire that the race was no longer one sui generis, but was a mere variety of the well-known and widely spread Semitic type.
We possess but few notices, and fewer assured representations, from which to form an opinion of the physical characteristics of the Babylonians.