In suitable localities, the keeping of herds led to a pastoral life: the Semites lived upon the grassy plains of the Euphrates and Tigris, and the Aryans upon those of India and of the Oxus and Jaxartes, of the Don and the Dnieper.

• 畜群的形成，在适于畜牧的地方导致了游牧生活：闪米特人在幼发拉底河和底格里斯河的草原上，雅利安人在印度、以及奥克苏斯河及亚克萨尔特河、顿河和德聂伯河的草原上。