It is curious how often erroneous theories have had a beneficial effect for particular branches of science.

According to the concept of transformational evolution, first clearly articulated by Lamarck, evolution consists of the gradual transformation of organisms from one condition of existence to another.

I feel that one species, mankind, doesn't have the right to exterminate

A species is a reproductive community of populations reproductively isolated from others that occupies a specific niche in nature.

Isolating mechanisms are biological properties of individuals that prevent the interbreeding of populations that are actually or potentially sympatric.

Evolution thus is merely contingent on certain processes articulated by Darwin: variation and selection.

I had found again and again that the most aberrant population of a species - often having reached species rank, and occasionally classified even as a separate genus - occurred at a peripheral location, indeed usually at the most isolated peripheral location.