Have you ever thought about the march of progress? For many millennia, our ancestors lived much the same way. You could die, be brought back to life 10,000 years later, and discover nothing had changed. Food was still wormy and rancid, tools were still made of rocks, folks still walked everywhere, and the Cubs were still losing. Then, a rapid series of developments dramatically increased the rate of human progress: the domestication of animals; the forging of metals; the shift from hunting and gathering to agriculture; the emergence of written language, eventually followed by the printing press, which permitted the dissemination of ideas, which inevitably led to the computer chip, which culminated in our generation’s greatest invention, the battery-powered pepper-grinder.