Kingdom (biology)

Definition and stakes

Portrait of A. de Quatrefages A. de Quatrefages,  The human species (1879)

“ Now they exist in man alone, and it is impossible to deny their importance. Thus they distinguish man from the animal as much as the phenomena of intelligence distinguish the animal from the plant, and as the phenomena of life distinguish the plant from the mineral. They are, therefore, the attributes of a kingdom, which we will call the Human Kingdom. ”
Source: Gutenberg

Robert Chambers,  Vestiges of the Natural History of Creation

“ It is but a small stretch of the argument to suppose that, one conspicuous organ of a large portion of our animal kingdom being thus universal, a parity in all the other organs—species for species, class for class, kingdom for kingdom—is highly likely, and that thus the inhabitants of all the other globes of space bear not only a general, but a particular resemblance to those of our own. ”
Source: Gutenberg

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