Glance briefly at the peoples of that age. The dominant of Hyborians are no longer uniformly tawny-haired and grey-eyed. They have mixed with other races. There is a strong Shemitish, even a Stygian strain among the peoples of Koth, and to a lesser extent, of Argos, while in the case of the latter, admixture with the Zingarans has been more extensive than with the Shemites. The eastern Brythunians have intermarried with the dark-skinned Zamorians, and the people of southern Aquilonia have mixed with the brown Zingarans until black hair and brown eyes are the dominant type in Poitain, the southern-most province. The ancient kingdom of Hyperborea is more aloof than the others, yet there is alien blood in plenty in its veins, from the capture of foreign women — Hyrkanians, Aesir and Zamorians. Only in the province of Gunderland, where the people keep no slaves, is the pure Hyborian stock found unblemished. But the barbarians have kept their bloodstream pure; the Cimmerians are tall and powerful, with dark hair and blue or grey eyes. The people of Nordheim are of similar build, but with white skins, blue eyes and golden or red hair. The Picts are of the same type as they always were — short, very dark, with black eyes and hair. The Hyrkanians are dark and generally tall and slender, though a squat slant-eyed type is more and more common among them, resulting from mixture with a curious race of intelligent, though stunted, aborigines, conquered by them among the mountains east of Vilayet, on their westward drift. The Shemites are generally of medium height, though sometimes when mixed with Stygian blood, gigantic, broadly and strongly built, with hook noses, dark eyes and blue-black hair. The Stygians are tall and well made, dusky, straight-featured — at least the ruling classes are of that type. The lower classes are a down-trodden, mongrel horde, a mixture of negroid, Stygian, Shemitish, even Hyborian bloods. South of Stygia are the vast black kingdoms of the Amazons, the Kushites, the Atlaians and the hybrid empire of Zembabwei.
Between Aquilonia and the Pictish wilderness lie the Bossonian marches, peopled by descendants of an aboriginal race, conquered by a tribe of Hyborians, early in the first ages of the Hyborian drift. This mixed people never attained the civilization of the purer Hyborians, and was pushed by them to the very fringe of the civilized world. The Bossonians are of medium height and complexion, their eyes brown or grey, and they are mesocephalic. They live mainly by agriculture, in large walled villages, and are part of the Aquilonian kingdom. Their marches extend from the Border kingdom in the north to Zingara in the southwest, forming a bulwark for Aquilonia against both the Cimmerians and the Picts. They are stubborn defensive fighters, and centuries of warfare against northern and western barbarians have caused them to evolve a type of defense almost impregnable against direct attack.
Five hundred years later the Hyborian civilization was swept away. Its fall was unique in that it was not brought about by internal decay, but by the growing power of the barbarian nations and the Hyrkanians. The Hyborian peoples were overthrown while their vigorous culture was in its prime.