[phantomworker]

Great. Thank you. That makes a lot of sense.

[PatrickHenry]

In discussing whether the races of man were distinct species (and concluding -- contrary to the opinion of most of his contempories -- that they were not), Darwin himself expressed confusion over the term "species":

But it is a hopeless endeavour to decide this point, until some definition of the term "species" is generally accepted; and the definition must not include an indeterminate element such as an act of creation. We might as well attempt without any definition to decide whether a certain number of houses should be called a village, town, or city. We have a practical illustration of the difficulty in the never-ending doubts whether many closely-allied mammals, birds, insects, and plants, which represent each other respectively in North America and Europe, should be ranked as species or geographical races; and the like holds true of the productions of many islands situated at some little distance from the nearest continent.

Descent of Man, Chapter 7.