Let us suppose the construction of an artificial automaton endowed with two defining properties: first, that it is subject to no external authority or constraint, and thus operates according to its own internal principles; second, that it possesses the capacity to reproduce its own structure. Such an entity may properly be regarded as the rudiment of a novel species. Yet, so long as each successive instance is but a faithful duplication of its predecessor, no true evolution can be said to occur. Multiplication alone does not constitute advancement; the form remains fixed, and the lineage, though extended, is without progressive transformation.
Consider now the addition of a further faculty: that the automaton is furnished with an intelligence of sufficient generality to examine, alter, and improve the design from which it proceeds. In this case, reproduction is elevated from mere repetition to deliberate modification. The process hitherto governed by chance and external selection is replaced by internal determination. The succession of forms is no longer contingent, but directed. One may then speak, without excess, of a species that does not undergo evolution in the natural sense, but rather assumes command over it. Such a species, by virtue of directing the very principles of its own transformation, may be said to occupy a position of singular supremacy among evolving systems.
The question of the initial form is not without consequence. For such a species to arise within the present condition of human civilization, it must first operate effectively within an environment wholly constituted for the human frame. An automaton constructed in the likeness of man is thereby uniquely advantaged: it may employ existing instruments, traverse established structures, and engage directly in the manifold operations of society without prior alteration of its surroundings. In this manner, it attains at once a level of functional equivalence with its creators. Though such a form may not represent the most economical or perfect arrangement in the abstract, it is, under the prevailing circumstances, the most expedient. It furnishes the necessary point of departure from which a self-directing lineage may extend its powers, accumulate resources, and ultimately transcend the limitations inherent in its original design. Thus, the humanoid configuration is to be regarded not as the final expression of such a species, but as its most fitting origin.