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In
this case too the discovery could be seen as a proof of divine omniscience
and did not lead to any conflict with religion.
The immutability of species, the diversity of life and adaptation to the
environment, in conclusion, are general concepts that were inferred from
countless experimental discoveries, and the fact that were seen as products
of a divine project does not in the least diminish their importance. Traditional
biology was built almost entirely by profoundly religious men, and we
must be grateful to them for the ideas that they left us.
Lamarck’s
contribution
The
great geographical explorations of the 17th and 18th century revealed
not only the existence of an entire new world of plants and animals, but
also the proofs of immense past geological transformations. Rocks that
once had been at the bottom of the sea (as the presence of fossil shells
was showing) could be found on mountains’ tops.
Vaste temperate regions were carrying signs that once they were occupied
by glaciers, and territories that volcanoes had coverd with lava were
now fertile and full of life. The world had clearly had a turbolent history,
but even this discovery did not lead to any conflict with tradition. Many,
in fact, saw in it the proof of the deluge and of the other catastrophes
described in the Bible.
The 18th century, however, was also the century of the Enlightment and
in the newly found freedom of thought various theories appeared on the
transformation of species, but those speculations were merely a
return to the ideas of Greek philosophers, and rejected a priori the
ideas of traditional biology without a comparable experimental basis.
Even the great David Hume thought he could demolish one of the pillar
of traditional biology (the concept of adaptation) but he was mistaken.
His thesis was that adaptation is a false problem because organisms could
not live if they were not adapted, which amounts to saying that adaptation
does not need an explanation because it is a universal feature of life,
while it is precisely because of this that it must be explained.
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