From the beginning of the century, the
inflow averaged little less than a million a year, and while about
one-fifth of this represented a temporary migration, four-fifths of it
meant a permanent addition to the population of the New World.
The character of this stream will inevitably determine to a large extent
the future of the American nation. The direct biological results, in
race mixture, are important enough, although not easy to define. The
indirect results, which are probably of no less importance to eugenics,
are so hard to follow that some students of the problem do not even
realize their existence.
The ancestors of all white Americans, of course, were immigrants not so
very many generations ago. But the earlier immigration was relatively
homogeneous and stringently selected by the dangers of the voyage, the
hardships of life in a new country, and the equality of opportunity
where free competition drove the unfit to the wall. There were few
people of eminence in the families that came to colonize North America,
but there was a high average of sturdy virtues, and a good deal of
ability, particularly in the Puritan and Huguenot invasions and in a
part of that of Virginia.
In the first three-quarters of the nineteenth century, the number of
these "patriots and founders" was greatly increased by the arrival of
immigrants of similar racial stocks from Ireland, Germany, Scandinavia,
and to a less extent from the other countries of northern and western
Europe.
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