... surplus population; the inrush of new hordes of invaders, drove them on. Ambition; the love of adventure; the lure of new opportunities in new lands, called them further. Meliorism,—the desire to better the conditions of life for themselves and for their children—animated them. In later years the necessity of disposing of surplus wealth impelled them. Driven, lured, coerced, ... — The American Empire • Scott Nearing
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