Excerpts from Belloc’s A Companion to Mr Wells’ ‘Outline
of History’
The Implications of Natural Selection … continued
- In the first place, note that, according to this
theory, there can be no staple type: there can be no fixity in species.
All is in flux. Environment is never exactly the same, even for two days
at a time, let alone two successive thousand years. Very long slow changes
in climate, or any other factor of environment, would necessarily involve
long, unceasing, slight transformation, never halting. The Theory necessarily
demands a living world in a state of slow but incessant transformation, with
no fixed mature results at the end of development.
-
- It is only by the loosest sort of thinking, and by
substituting imagination for close reasoning, the ideas of Natural Selection
and permanent stable types can be reconciled.
- Thus some have said that the Seal was "sifted out"
by Natural selection, got more and more suited to its habitat by ‘survival
of the fittest’ until it had no further need for adaptation: it was at last
perfectly adapted to the purpose of its life.
- Well one of the most pressing needs of the seal under
the conditions of its life is to scramble on to the ice floes in order to
escape from its most deadly enemy. It does so most clumsily and ineffectually
by the help of its flappers. For countless generations Natural Selection
has had the time to work if it were capable of bettering that state of affairs
by producing flappers more serviceable. It has not done so. Why? Not because
the Seal "is in equilibrium" but because, however it may have evolved, it
is now a fixed type: mature: It is what is and can now no longer change its
fundamental structure.
- It is true that Darwin and others talk vaguely of
the process "reaching equilibrium", but that, according to his own theory,
is a contradiction in terms. Under Natural Selection there can be none such.
- Darwin, Wallace, and the rest did not think clearly
enough to see that this was so, but so it is. If a hare runs fast because
it has developed its speed through faster and faster hares who "survived"
because their speed made them "fitter" to escape their enemies, then the process
demands that the speed shall continually increase. Your hare of 1925 that
can cover a measured mile in three and a half must develop into your hare
of AD 20,000 who can cover it in three: for there is no doubt whatsoever
that an increase of speed has survival value. And he must be developing
all the time. There is no escape from that conclusion; if the theory of Natural
Selection held water: which it doesn’t.
- That is the first necessary result of Natural selection.
If the theory of Natural Selection is true there are not now, and cannot
have been in the past, fixed types recognizable by marked and permanent characters.
- Next observe that the theory of Natural Selection
also demands a regular progression, and a very slow one. It involves, for
instance the development of a land animal out of a water animal by an immense
accumulation of exceedingly slight differences in each generation, favourable
to a water animal’s longer and longer bouts of staying out of the water. These
exceedingly slight differences in each generation are presupposed to be only
such as we observe between parent and child.
- Darwinian Natural Selection as a prime cause can
admit no rapid, startling changes. [NB Renewed, 20th cent interest
in the Cambrian Explosion a relatively short period of time in which all complex
animal form developed, deals the final blow to this theory JEB]. For it presupposes
a purely blind, unintentional, "sieve-like" action, not merely as killing
off the unfit — which is obvious — but as producing gradually increasing
fitness, with no inherent power in the organism for adaptation. According
to Darwinian Natural Selection, what works the change is a vast number of
successive tiny differences such as always appear between parent and progeny.
To turn out, for instance, the white bear of the Arctic from the general
undifferentiated type of subfusc beardom you must have hardly perceptible
steps beginning with the slightly lighter hue of a few bears, and proceeding
gradually for aeons and aeons until only pure white survived (though however
one could get at pure white by such a process it would puzzle them to say!).
Natural Selection, then, imperatively demands for each species a slow ascension,
a regular, inclined plane, produced over a prodigious space of time, in which
the animal is getting whiter and whiter, or fleeter and fleeter, or what
not, by infinitesimal degrees. The theory of Natural Selection necessitates
the presence in all fossils, and even during any considerable historical
period, of increasing progressive slight differences in type.
- It is no good saying that Natural Selection might
apply to highly suitable variations coming at exactly the right moment to
benefit the animal. Such variations indicate design of some sort and Will.
If the climate gets colder and very woolly types of an animal immediately
begin to appear, that is not natural selection; that is a startling but obvious
adaptation, due to some other cause, of organism to environment. It is the
very negation of a blind causeless, undefined, unwilled process which the
theory of natural Selection was intended to bolster up.
- Again, Natural Selection implies advance by the killing
off of the organism not possessed of a specific advantage. How is then that
organisms not possessed of the advantage to survive — as certainly they do
—side by side with the advantaged and in the same environment? The Elephant’s
trunk grew longer because the short trunkites were killed off. What of the
Tapir?
- Again, Natural Selection cannot allow itself to be
ousted by any rival aid to development. This is a very important point. The
whole point of Natural Selection as the explanation of the difference between
living beings is that it is mechanical. The moment you have to prop it up
by saying "Animals with similar variations will tend to mate one with the
other" or "Striking change in environment will tend to produce corresponding
variations" you will be abandoning Natural Selection, and covering up your
retreat with mere verbiage. Why "tend"? The theory of Natural Selection
is a jealous God. And it will admit no rival, nor even any support. You must
make it your mainstay or give it up: for the whole point of it is that it
permits you, if you will, to eliminate Will and Mind from the Universe. The
moment you have to prop it up with some theory involving Will and Mind the
essence of it disappears. Therefore does Weissmann, the most famous of its
later defenders, ascribe to it "All might" (to make a barbaric translation
of his term) and desperately add that we "must" accept Natural Selection
because the only alternative is Design — that is God; the Inadmissible: the
Dogmatically Denied.
Suppose a man to say, "No one threw that stone: it
hit my window by the force of gravity."Another then points out that a stone,
merely falling, would have gone past the window, and that the stone, from
the course it took, striking the window, must have been thrown by someone
to take the glass at the angle it did. To this the man replies: "Well, yes,
perhaps: but gravity influenced its course." Clearly he has abandoned his
case. …. That is exactly parallel to the old-fashioned advocate of Natural
Selection who reluctantly admits, on modern evidence — and mainly through
the work of De Vries — great and rapid changes adapting animals to a new
environment, but adds, "Anyhow, those that don’t change will be killed off."
Of course they will! But that isn’t the point. The point is that the killing
off of the unfit is proved not to be the agent of change. The climate gets
colder. Much thicker fleeces begin to appear. Such animals as don’t show
the new thick fleeces begin to die out. Obviously! — But that doesn’t explain
why the thicker fleeces began to appear. (On De Vries account of sudden adaptation
JB). If you admit Mutation (the name for rapid changes) or Saltatory Evolution
(Evolution by jumps) poor old Natural Selection goes by the board.
In the same way Natural Selection does not mean that,
upon a change of environment, things unsuitable to the new conditions tend
to disappear. Of course they do. If there is a flood, fishes survive, cattle
are drowned. The fishes are fitter to survive the flood than the cattle,
there would be at the end of it plenty of fish and no cattle. But to talk
of that as Natural Selection is to use the same word in two different senses.
The theory of Natural Selection as the agent of Evolution does not
mean that the floods drown the cattle and don’t drown fish. We all know that.
The theory means that successive floods turn cattle into fish — and that’s
a very different proposition.
The theory of Natural Selection does not mean that
things die out when they cannot live; if it only meant that it would not be
worth stating. It means that the chance of survival, through exceedingly small
and inevitable slight differences between Parent and Offspring, is the cause
producing marvels in adaptation and beauty and special action in a million
forms which make up the life of the world. Its chief use has been to back
up the denial of God, and now it has broken down the opponents of Design
in the Universe must seek for a new reply. They are still seeking it.
Next note that the theory of Natural Selection implies
a continual accumulation of fresh advantages; although for this there is
no sort of necessity and, on a theory of blind chance, no chance of such
a thing. It is mere gratuitous assumption with no reason behind it and all
actual experiment against it. This is the point which Morgan (Professor of
Experimental Zoology at Columbia University) so powerfully emphasizes in
his critique of the Theory of Evolution which came out just after the War
(1914-18) .To apply the theory to that simple case of animal on the tidal
beach. Those with minute advantages over the average in the way of standing
slightly longer immersion have survival value over those who are only on
or below the average. But why — by the mere blind selection of death — should
the advantage accumulate from generation to generation? Why should new advantageous
exceptions, each better than the last, appear in unbroken succession generation
after generation?
Lastly, there is the exceedingly important, the essential,
point that, according to the theory of Natural Selection, each slight successive
change in the whole series must give its possessor a survival-value. Not
only must a fully formed flapper be an advantage (to a whale) over a leg,
by the time it has become aquatic, but a half-formed flapper must be an advantage
to the whale while still on the land. Clearly it was nothing of the kind.
If transformism be true (which is not certain) then Design explains the leg
into a flapper despite the intermediate disadvantages. If there is Design
behind the transformation, if there is special protection for the heavily
handicapped intermediate form, one can understand the possibility of it. Under
Natural Selection it is impossible.
So much for the Implications of the theory. I hope
I have put them as clearly as may be, and accurately; not a very hard task,
for it was an extremely crude and simple theory during its short life, and
could be grasped (and refuted) by anyone.
Let me first summarise these implications.
- First change must be continual and types must be always
in a state of flux. Stability of Type and Natural Selection form a contradiction
in terms. You can have one or the other but you cannot have both.
- Second, Natural Selection inevitably implies that,
on searching the records of Evolution, we shall find only gradual change,
proceeding continually, so that the ascending organisms follow as it were
regular inclined planes showing no steps. The whole of evolution should, under
natural selection prove to be of this kind. Thus you would have, say, tigers
as they are now, gradually developing out of some tiger ancestor in the past
by a regular and uninterrupted process, never achieving a fixed type but
perpetually changing as time went on; and that perpetual change would still
be going on today. The world about us would not show (as it does) a vast
number of strongly separated types but a confused jumble of forms all melting
one into another.
- Third, Natural Selection presupposes Evolution through
the killing off of individuals lacking certain advantages, how then do other
types continue to be with us in spit of lacking these advantages?
- Natural selection must stand or fall of itself. If
you try to prop it up with Will or Design, inherent in the organism, or acting
in any other fashion, you destroy its whole thesis. If you say, for instance,
"the country becoming dryer, animals which adapted themselves to the new
conditions survived, and those who could not adapt themselves died out",
that is no example of Natural Selection as an agent of Evolution.
For when you say "Animals which adapted themselves to the new conditions"
you are presupposing an inherent power in the animal to adapt itself; you
are presupposing a form of Will or Design, and thereby denying the purely
mechanical action, the unintelligent sieve of Natural Selection as an agent.
- Natural Selection presupposes that in every stage
of the slow process of development by infinitesimal differences, each successive
difference is more advantageous than the last and has a special survival
value. A Bird with fully formed wings has a survival value through being
able to fly away from land enemies. But if it evolved from a reptile by Natural
Selection, then each stage between the useful reptilian fore-leg and the
useful wing must have had a special advantage over the stage immediately
preceding it. There must have been an advantage in the foreleg getting stumpy,
then in its getting stumpier, then in its getting so stumpy that the beast
couldn’t use it at-all. And this must be true of every change in all the
millions of tiny evolutionary changes proceeding through aeons of time. All
the way along, from the first signs of something which later on will be an
advantage to the mature type, through myriads of generations, from the first
origins when the organ was as yet rudimentary to the last when it was perfected,
every step must have had a survival value over the last. And this must apply
not only to broad cases, such as the reptiles’ fore-leg turning into a bird’s
wing, but to every part of each organ. Otherwise the theory breaks down.
The implications then of Natural selection as the
blind agent of development, "give one furiously to think". Merely stated roughly
as I have done here, they shake the ordinary man’s confidence in it. But
when we come to ordered proofs against it, we shall find these proofs conclusive.
To these I now turn.
For the arguments against Natural Selection.
Click on blue line