pWe would still be living at subsistence level as hunter-gatherers if not for domestication. It is no accident that the cradle of civilization--the Middle East--is where sheep, goats, pigs, cattle, and cats commenced their fatefully intimate association with humans.ppBefore the agricultural revolution, there were perhaps 10 million humans on earth. Now there are more than 7 billion of us. Our domesticated species have also thrived, in stark contrast to their wild ancestors. In a human-constructed environment--or man-made world--it pays to be domesticated.ppDomestication is an evolutionary process first and foremost. What most distinguishes domesticated animals from their wild ancestors are genetic alterations resulting in tameness, the capacity to tolerate close human proximity. But selection for tameness often results in a host of seemingly unrelated by-products, including floppy ears, skeletal alterations, reduced aggression, increased sociality, and reduced brain size. It's a packag