“The resulting progress is astounding, outstripping our ability to appreciate the multifarious changes. Some 200 years ago the average human lifespan in the United States was 37 years; it now approaches 88! About 100 years ago, an American farmer could feed on average just four others; today, it is 200! Fifty years ago the Oxford English Dictionary weighed 300 pounds and took up 4 feet of shelf space; today, it fits on a 1-ounce flash drive or can be accessed via the Web from virtually anywhere!”