During the reigns of Vasili and Ivan the Great a new factor in Russian history comes into notice, and afterwards develops into no little importance. This was the appearance in two distinct localities, which may be roughly designated as the lower basins of the Dniepr and the Don respectively, of organised bands of “steppe-folk,” who were neither exactly Russian nor Tartar, nomad nor settled, and who were known under the vague appellation of Kazaks, or Kozaks. The name “has been variously derived from words meaning, in radically distinct languages, an armed man, a sabre, a rover, a goat, a promontory, a coat, a cassock, and a district in Circassia”; an equal uncertainty hangs over the origin of the race, or rather races. Perhaps the clearest account of the etymology and ethnology of the Kozak is that given by a Russian author in a history of the peoples of the Don region. “Kazak signifies alike volunteer, horseman, freebooter. Malo-Russians, mingled with remains of peoples known under the common name of _Tcherni Kloboukie_, under the name of Kazaks, constituted one people, who became to all intents and purposes Russian ... their fathers dwelling from the tenth century in the neighbourhood of Kiev, were themselves already almost Russian. Increasing more and more in numbers, maintaining among themselves the spirit of independence and fraternity, the [western] Kazaks organised a Christian republic, and established themselves between the lower basins of the Dniepr and Dniestr, building villages and fortresses.”[132] The causes which drove these Slav and Turko outcasts into the wild steppe-land and scarcely accessible islands of the Dniepr, and welded them together in an origin-obliterating union, were first the Mongol invasion, and secondly the gradual establishment of irksome and far-reaching central authorities both in Moskovy and Lit’uania. The absolutism of the one monarchy, and the Catholic persecution of the other, sent men in search of liberty, to swell the ranks of those whose fathers had fled from the insecurity and degradation of a Tartar-haunted land. Similar causes--hostility to the surrounding khanates and impatience of the certain taxes and doubtful protection of the Moskovite government--were responsible for the existence of the Don Kozaks, among whom, however, there was a strong Tcherkess (Circassian) strain, while the Russian element was proportionately weaker. But the great factor in this double evolution was undoubtedly a physico-geographical one. The nature of the steppes themselves, those vast-stretching, level, grass-grown wolds, spread in seeming endlessness under the boundless sky, those solitudes where a man and his horse might lose themselves from all pursuit, called as irresistibly to the lustre after freedom as ever the Highlands of Scotland to the Saxon-hating Kelts, or the Tcherni-Gora to the unconquered Slavs of the Balkan coast. And having lured, it held, and holding, moulded.