(This is the nth time that I am doing a retrospective of this essay that I wrote in the early 2000s, hoping against hope that for its long-term survival, humanity will finally learn to be peaceably rational and rationally peaceable to keep the world free from strife and disorder. Otherwise, isn't it obvious that all efforts toward mutual progress among people are in vain and meaningless?)
IF I were asked to describe the world as I see it today, I would readily give this answer: it has hardly changed since 2,200 years ago when Archimedes, the Greek mathematician and physicist, was said to have bragged that he could move the world if only he had the lever to lift it. For all his ingenuity and imagination, however, Archimedes was dead wrong on this count. He knew the power of the lever like the back of his hand, assiduously applying this knowledge to design military catapults and grappling irons; he figured out with stunning accuracy the mathematical properties of circles and spheres, including the ratio of the circumference of a circle to its diameter, or what we now know as pi (3.14159265...); he began the science of hydrostatics, or the forces that govern stationary fluids, after discovering the now familiar Archimedes Principle; and he even invented the Archimedes screw, an ingenious water-raising machine still used today to irrigate fields in Egypt.
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