Hence a stage in the history of certain peoples when, in questioning what is commonly accepted, intellectual freedom is born. Such a stage was markedly reached whenever, for example, an individual here and there challenged the current belief about the beginnings and nature of things, beliefs held because they were taught, not because their correspondence with fact had been examined. A pioneer (French, _pionnier_; Italian, _pedone_; from Latin _pedes_) is, literally, a foot-soldier; one who goes before an army to clear the road of obstructions. Hence the application of the term to men who are in the van of any new movement; hence its special fitness in the present connection, as designating men whose speculations cut a pathway through jungles of myth and legend to the realities of things. The Pioneers of Evolution--the first on record to doubt the truth of the theory of special creation, whether as the work of departmental gods or of one Supreme Deity, matters not--lived in Greece about the time already mentioned; six centuries before Christ. Not in the early stages of the Evolution idea, in the Greece limited, as now, to a rugged peninsula in the southeastern corner of Europe and to the surrounding islands, but in the Greece which then included Ionia, on the opposite seaboard of Asia Minor. From times beyond memory or record, the islands of the Ægean had been the nurseries of culture and adventure. Thence the maritime inhabitants had spread themselves both east and west, feeding the spirit of inquiry, and imbibing influences from older civilizations, notably of Egypt and Chaldæa. But, mix as they might with other peoples, the Greeks never lost their own strongly marked individuality, and, in imparting what they had acquired or discovered to younger peoples, that is, younger in culture, they stamped it with an impress all their own. At the later period with which we are dealing, refugees from the Peloponnesus, who would not submit to the Dorian yoke, had been long settled in Ionia. To what extent they had been influenced by contact with their neighbours is a question which, even were it easy to answer, need not occupy us here. Certain it is that trade and travel had widened their intellectual horizon, and although India lay too remote to touch them closely (if that incurious, dreamy East had touched them, it would have taught them nothing), there was Babylonia with her star-watchers, and Egypt with her land-surveyors. From the one, these Ionians probably gained knowledge of certain periodic movements of some of the heavenly bodies; and from the other, a few rules of mensuration, perchance a little crude science. But this is conjecture. For all the rest that she evolved, and with which she enriched the world, ancient Greece is in debt to none.