The poster boy for our superabled future is Oscar Pistorius, an increasingly famous South African sprinter who happens to have had both of his legs amputated below the knee. Using upside down question mark-shaped carbon fiber sprinting prosthetics, called Cheetah blades, Mr. Pistorius can challenge the fastest sprinters in the world.

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Take, for example, the African jungle, the home of the cheetah. On whom does the cheetah prey? The old, the sick, the wounded, the weak, the very young, but never the strong. Lesson: If you would not be prey, you had better be strong.