It does the same for the mother's
fraternity. Next it considers the fraternity to which the father's
father belongs, considers their consorts and their children and
grandchildren, and then takes up the study of the fraternity of the
father's mother in the same way. The mother's parents next receive
attention; and then the earlier generations are similarly treated, as
far as the available records will allow. A pedigree study constructed on
this plan really shows what traits are running through the families
involved, and is vastly more significant than a mere chain of links,
even though this might run through a dozen generations.
(5) With these changes, genealogy would become the study of heredity,
rather than the study of lineage.
It is not meant to say that the study of heredity is nothing more than
applied genealogy. As understood nowadays, it includes mathematical and
biological territory which must always be foreign to genealogy. It might
be said that in so far as man is concerned, heredity is the
interpretation of genealogy, and eugenics the application of heredity.
Genealogy should give its students a vision of the species as a great
group of ever-changing, interrelated organisms, a great network
originating in the obscurity of the past, stretching forward into the
obscurity of the future, every individual in it organically related to
every other, and all of them the heritors of the past in a very real
sense.
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