Almost all that transformism tells us to-day would be preserved, open to interpretation in another way.
It does not enter into our plan to set down here the proofs of transformism.
From zoology has arisen the study of transformism, which now dominates the whole of biology.
If it is based only on the pure theory of transformism, there is nothing explained at all.
But these are characteristics of life itself, irrespective of all its specific forms, which alone are concerned in transformism.
That is not quite without logical importance, for it shows that not biology alone has led to the transformism hypothesis.
That is the Darwinian part of an explanation of transformism which may be conceded as an hypothesis.
And so we are led to the negative side of the theory of transformism, after having discussed its positive half.
The idea of transformism is already in germ in the natural classification of organized beings.
But we must leave this problem an open question, as long as our actual knowledge about transformism remains as poor as it is.