Cat fanciers who consider their pets majestic have history on their side: felines were domesticated in ancient Egypt around 2000 B.C. while their European cousins still ran wild. Over the centuries they gained an exalted position in royal society--revered as an incarnation of a goddess, modeled in bronze statuettes, and even mummified and buried with their owners. Yet cats also won commoners' respect for their humble origins and protective instincts,...