An advantage derivable from such an avowal of the stability of types, as against its covert assumption and overt disavowal, is that it enables the student to look for the beginning, in time and space, of any given racial stock with which his inquiry is concerned, and to handle it as a unit throughout its life-history. * * * * * In all probability each of the leading racial stocks of Europe began its life-history on what would currently be accounted a low level of savagery. And yet this phase of savagery, whatever it may have been like, will have been removed from the first beginnings of human culture by a long series of thousands of years. That such was the case, for instance, with the European blond is scarcely to be questioned;[68] and it is at least highly probable that the other stocks now associated with the blond, though probably older, must also have come into being relatively late in the life-history of the species. Vague as this dating may be, it signifies that the initial phase in the life-history of at least one, and presumably of all, of the leading races of Europe falls in a savage culture of a relatively advanced kind as compared with the rudest human beginnings. Therefore when these stocks began life, and so were required to make good their survival, the selective conditions imposed on them, and to which they were required to conform on pain of extinction, were the conditions of a savage culture which had already made some appreciable advance in the arts of life. They had not to meet brute nature in the helpless nakedness of those remote ancestors in whom humanity first began. Mutationally speaking, the stock was born to the use of tools and to the facile mastery of a relatively advanced technology. And conversely it is a fair inference that these stocks that have peopled Europe would have been unfit to survive if they had come into the world before some appreciable advance in technology had been made. That is to say, these stocks could not by native gift have been fit for a wild life, in the unqualified sense of the term; nor have they ever lived a life of nature in any such sense. They came into the savage world after the race had lived through many thousand years of technological experience and (presumably) many successive mutational alterations of racial type, and they were fitted to the exigencies of the savage world into which they came rather than those of any earlier phase of savagery. The youngest of them, the latest mutant, emerged in early neolithic times, and since he eminently made good his fitness to survive under those conditions he presumably emerged with such an endowment of traits, physical and spiritual, as those conditions called for; and also presumably with no appreciable burden of aptitudes, propensities, instincts, capacities that would be disserviceable, or perhaps even that would be wholly unserviceable, in the circumstances in which he was placed.