Each autumn, millions of men and increasing numbers of women don camouflage or blaze orange outfits and go afield in pursuit of game. For much of American history, there was no need to explain why they did this. Hunting was simply another aspect of the annual cycle of planting, breeding, and harvesting. But modern hunting began separating from its agrarian roots well over a century ago, and although it has retained its connection to the metaphor of...