homo-sapiens

No existing form of anthropoid ape is even remotely related to the stock which has given rise to man.

The most satisfactory definition of man from the scientific point of view is probably Man the Tool-maker.

Perhaps if zoologists would contemplate the wide variations presented by many plants of indubitably one and the same species, and the still wider diversities of long cultivated races from an original stock, they would find more than one instructive parallel to the case of the longest domesticated of all species, man.

If a single cell, under appropriate conditions, becomes a man in the space of a few years, there can surely be no difficulty in understanding how, under appropriate conditions, a cell may, in the course of untold millions of years, give origin to the human race.