Bactria lies on the frontier of India, Little Thibet, Bukharia, (the north India of Herodotus and Ctesias,) and the desert of Cobi, (Herodotus's golden desert): the road to China runs through this country. Nature, by the geographical situation in which she has placed Bactria, seems to have destined it to be the great emporium for the wares of south-eastern Asia; and in proportion as we penetrate into early history, we become convinced that Bactria, like Babylon, must have been one of the earliest seats of international commerce, and consequently, if not the birthplace, one of the cradles of infant civilization. (_l_) Sogdiana, the territory between the upper Oxus and upper Jaxartes, the latter dividing it from central Asia. (A part of Great Bukharia.) Its peculiarities and advantages similar to those of the neighbouring Bactria. Capital: Maracanda (Samarcand). B. South-eastern Asia, or Asia beyond the Indus, offers nothing remarkable for history till a later period. See Book v, Period iv. _General Preliminary Observations upon the History and Constitution of the great Asiatic Empires._ 1. Asia contained in ancient times, as it does at present, empires of immense extent, differing materially both in this respect and in their constitution from the civilized nations of Europe. Changes were frequent; but the form of government continued nearly always the same. Some deeply rooted and active principles therefore must have been in constant operation, to have given so repeatedly, in these various revolutions, the same organization to the kingdoms of Asia. 2. The great revolutions of Asia, with the exception of that caused by Alexander, were effected by the numerous and powerful nomad races which inhabited a large portion of that continent. Pressed by necessity or circumstances, they forsook their own seats, founded new kingdoms, and carried war and conquest into the fruitful and cultivated lands of southern Asia, until, enervated by luxury, the consequence of the change in their mode of life, they were in their turn, and in a similar manner, subjugated. 3. This origin, common to all Asiatic kingdoms, accounts for their immense extent, their rapid establishment, and their generally brief duration. 4. The internal organization must, for the same reasons, have been nearly alike in all; and the constant reappearance of despotism is accounted for, partly by the rights of conquest, partly by the vast extent of the subdued countries, which obliged the rulers to have recourse to satrap-government. 5. To this, it must moreover be added, that among all the considerable nations of inner Asia, the paternal government of every household was corrupted by polygamy: where that custom exists, a good political constitution is impossible; fathers being converted into domestic despots, are ready to pay the same abject obedience to their sovereign that they exact from their family and dependants in their domestic economy.