"... how inadequate the human being is—the flesh-and-bone human, a living fossil, immutable on the historical scale, perfectly adapted to external conditions at the time the human species was triumphing over the mammoth but already overtaken by them when required to use muscle to operate the trireme.... Mechanical automation, from the mechanical brontosaurus of the nineteenth-century rolling mill to the automatic pilot of today, represent the penultimate possible stage of the process begun by the Australanthrope armed with a chopper. The freeing of the areas of the motor cortex of the brain, definitively accomplished with erect posture, will be complete when we succeed in exteriorizing the human motor brain. Beyond that, hardly anything more can be imagined other than the exteriorization of intellectual thought through the development of machines capable not only of exercising judgment (that stage is already here) but also of injecting affectivity into their judgment, taking sides, waxing enthusiastic, or being plunged into despair at the immensity of their task. Once Homo sapiens had equipped such machines with the mechanical ability to reproduce themselves, there would be nothing left for the human to do but withdraw into the paleontological twilight."