Notwithstanding, some reflections seem to favor the supposition, to
render more probable the hypothesis, that man is a production formed in
the course of time; who is peculiar to the globe he inhabits, who is the
result of the peculiar laws by which it is directed; who, consequently,
can only date his formation as coeval with that of his planet. Existence
is essential to the universe, or the total assemblage of matter
essentially varied that presents itself to our contemplation; the
combinations, the forms, however, are not essential. This granted,
although the matter of which the earth is composed has always existed,
this earth may not always have had its present form--its actual
properties; perhaps it may be a mass detached in the course of time from
some other celestial body;--perhaps it is the result of the spots, or
those encrustations which astronomers discover in the sun's disk, which
have had the faculty to diffuse themselves over our planetary system;--
perhaps the sphere we inhabit may be an extinguished or a displaced
comet, which heretofore occupied some other place in the regions of
space;--which, consequently, was then competent to produce beings very
different from those we now behold spread over its surface; seeing that
its then position, its nature, must have rendered its productions
different from those which at this day it offers to our view.

Whatever may be the supposition adopted, plants, animals, men, can only
be regarded as productions inherent in and natural to our globe, in the
position and in the circumstances in which it is actually found: these
productions it would be reasonable to infer would be changed, if this
globe by any revolution should happen to shift its situation. What
appears to strengthen this hypothesis, is, that on our ball itself, all
the productions vary, by reason of its different climates: men, animals,
vegetables, minerals, are not the same on every part of it: they vary