ronment theory much further, pointing out instance after
instance of modifications made in species apparently to adapt it to
circumstances and environment: for instance, that the brilliant colors
of the leopard, which make it so conspicuous in Regent's Park, conceal
it in a tropical jungle. Finally he wrote, as his declaration of faith,
'The world has been evolved, not created: it has arisen little by little
from a small beginning, and has increased through the activity of the
elemental forces embodied in itself, and so has rather grown than come
into being at an almighty word. What a sublime idea of the infinite
might of the great Architect, the Cause of all causes, the Father of all
fathers, the Ens Entium! For if we would compare the Infinite, it would
surely require a greater Infinite to cause the causes of effects than to
produce the effects themselves.' In this, published in the year 1794,
you have nineteenth-century Evolution precisely defined. And Erasmus
Darwin was by no means its only apostle. It was in the air then. A
German biologist named Treviranus, whose book was published in 1802,
wrote, 'In every living being there exists a capacity for endless
diversity of form. Each possesses the power of adapting its organization
to the variations of the external world; and it is this power, called
into activity by cosmic changes, which has enabled the simple zoophytes
of the primitive world to climb to higher and higher stages of
organization, and has brought endless variety into nature.' There you
have your evolution of Man from the amoeba all complete whilst Nelson
was still alive on the seas. And in 1809, before the battle of Waterloo,
a French soldier named Lamarck, who had beaten his musket into a
microscope and turned zoologist, declared that species were an illusion
produced by the shortness of our individual lives, and that they were
constantly changing and melting into one another and into new forms as
surely as the hand of a clock is continually moving, though it moves so
slowly that it looks stationary to us. We have since come to think that
its industry is less continuous: that the clock stops for a long time,
and then is suddenly 'put on' by a mysterious finger. But never mind
that just at present.

THE ADVENT OF THE NEO-LAMARCKIANS

I call your special attention to Lamarck, because later on there were
Neo-Lamarckians as well as Neo-Darwinians. I was a Neo-Lamarckian.
Lamarck passed on from the conce