At present it is hard to say to what extent undesirable traits occur in
the most distinguished families; and it is of great importance that this
should be learned.
Maurice Fishberg contends[160] that many Jewish families are
characterized by extremes,--that in each generation they have produced
more ability and also more disability than would ordinarily be expected.
This seems to be true of some of the more prominent old American
families as well. On the other hand, large families can be found, such
as the remarkable family of New England office-holders described by
Merton T. Goodrich,[161] in which there is a steady production of civic
worth in every generation with almost no mental defectives or gross
physical defectives. In such a family there is a high sustained level.
It is such strains which eugenists wish especially to increase.
In this connection it is again worth noting that a really great man is
rarely found in an ancestry devoid of ability. This was pointed out in
the first chapter, but is certain to strike the genealogist's attention
forcibly. Abraham Lincoln is often quoted as an exception; but more
recent studies of his ancestry have shown that he is not really an
exception; that, as Ida M.
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