thought, or fact. According to language,
according to reason, and according to nature, all human beings constitute
a {~GREEK SMALL LETTER GAMMA~}{~GREEK SMALL LETTER EPSILON WITH OXIA~}{~GREEK SMALL LETTER NU~}{~GREEK SMALL LETTER OMICRON~}{~GREEK SMALL LETTER FINAL SIGMA~}, or generation, so long as they are supposed to have common
ancestors; but with regard to all living beings we can only say that they
form an {~GREEK SMALL LETTER EPSILON~}{~GREEK SMALL LETTER IOTA WITH PSILI AND PERISPOMENI~}{~GREEK SMALL LETTER DELTA~}{~GREEK SMALL LETTER OMICRON~}{~GREEK SMALL LETTER FINAL SIGMA~}--that is, agree in certain appearances, until it has been
proved that even Mr. Darwin was too modest in admitting at least four or
five different ancestors for the whole animal world.(15)

In tracing the history of these two words, {~GREEK SMALL LETTER GAMMA~}{~GREEK SMALL LETTER EPSILON WITH OXIA~}{~GREEK SMALL LETTER NU~}{~GREEK SMALL LETTER OMICRON~}{~GREEK SMALL LETTER FINAL SIGMA~} and {~GREEK SMALL LETTER EPSILON~}{~GREEK SMALL LETTER IOTA WITH PSILI AND PERISPOMENI~}{~GREEK SMALL LETTER DELTA~}{~GREEK SMALL LETTER OMICRON~}{~GREEK SMALL LETTER FINAL SIGMA~}, you may see
passing before your eyes almost the whole panorama of philosophy, from
Plato's "ideas" down to Hegel's _Idee_. The question of _genera_, their
origin and subdivision, occupied chiefly the attention of natural
philosophers, who, after long controversies about the origin and
classification of _genera_ and _species_, seem at last, thanks to the
clear sight of Darwin, to have arrived at the old truth which was
prefigured in language--namely, that Nature knows nothing but _genera_, or
generations, to be traced back to a limited number of ancestors, and that
the so-called _species_ are only _genera_, whose genealogical descent is
_as yet_ more or less obscure.

But the question as to the nature of the {~GREEK SMALL LETTER EPSILON~}{~GREEK SMALL LETTER IOTA WITH PSILI AND PERISPOMENI~}{~GREEK SMALL LETTER DELTA~}{~GREEK SMALL LETTER OMICRON~}{~GREEK SMALL LETTER FINAL SIGMA~} became a vital question in
every system of philosophy. Granting, for instance, that women in every
clime and country formed one species, it was soon asked what constituted a
species? If all women shared a common form, what was that form? Where was
it? So long as it was supposed that all women descended from Eve, the
difficulty might be slurred over by the name of heredity. But the more
thoughtful would ask even