In those days, the larger the family, the greater the wealth and power of the head of the household. In infancy, the offspring might be a charge and a source of poverty; but, as they grew up, they more than repaid the cost of maintenance,--they became, in fact, a source of wealth and power and aggrandisement to the parent. Now, according to all known traditions, the ancient fathers of families gloried in a numerous progeny. In the history of the Jews, families of fifty and upwards are frequently spoken of. Josephus informs us, that Gedeon had seventy sons; Jair, thirty; Apsan, thirty sons and thirty daughters; Abdon, forty sons--all of them living at the time of his death--besides thirty grandsons. Indeed, the Old Testament abounds in examples showing the multitudinous progeny ascribed to the old patriarchs--most of them, too, born of concubines, under what the modern world would call _disparaging_ circumstances. The traditions of early Greece harmonise, in this respect, with those of the Jews. Who has not read of the fifty daughters of Danaüs? In Homer, we find old Priam appealing to his numerous progeny, as the best means of exciting pity and respect in the vindictive breast of Achilles. We find him telling of his fifty children--of nineteen born of the same mother, Hecuba; and all the rest, of concubines. Livy and Plutarch tell us of the three hundred Fabians--all of the same family--who perished in a great battle against the Tuscans, fought in the early wars of the Republic; and Plutarch also makes mention, in his Life of Theseus, of a certain personage, Pallas, who had fifty children. From these and innumerable testimonies of a similar kind, we may readily conceive that these numerous wives and concubines kept by the heads of families in early times made fathers vastly more important personages than they are nowadays, and gave them progenies which, in comparison with modern ones, might be considered clans or tribes. What with wives, concubines, children, and grandchildren, every such father was veritably the head of a community; and inasmuch as his power was absolute over each and all, he had every motive that selfishness could dictate to make them, and keep them, slaves for his aggrandisement and pleasure. In fact, the more numerous his progeny and household, the greater was his source of wealth, the higher his status, and the better his security against personal violence in lawless times. That slavery should originate and grow up in this way appears to us perfectly natural. At all events, in no other way has it ever been, or can it ever be, satisfactorily accounted for.