答:世界上最早的奴隶制国家大都发生在大河流域。古代希腊作家希罗多德把埃及看作是尼罗河的礼物,在这里早在公元前3200年就建立起以孟斐斯为首都的统一的奴隶制国家。同样,在公元前四千年代末三千年代初,在两河流域(幼发拉底河与底格里斯河)也出现了许多城市国家,古巴比伦文化就发祥在这里。从印度河流域发现的规模巨大的上古城市废墟(摩亨佐·达罗与哈拉巴)来看,西北印度早在公元前三千年代就已存 A: The first slavery countries in the world occurred mostly in the great river basins. Herodotus, an ancient Greek writer, regarded Egypt as a gift to the Nile, where a united slavery state was founded as early as 3,200 BC with Memphis as its capital. Similarly, in the late fourth half of the thirties and the early thirties of the third millennium BC, many urban countries also emerged in the two rivers (the Euphrates and the Tigris) where the ancient Babylonian culture was born. Viewed from the huge ruins of the ancient cities found in the Indus Valley (Mohenzau Darrow and Haramba), Northwest India existed as early as the 3000s BC