Condemned and yet feared by emperors, almost certain to be slaughtered and yet adored by the masses, the gladiator was the superstar of his day. His existence was invariably short and violent, improved only faintly by the prospect of honor, wealth, and public attention. Yet men gave up their freedom to become gladiators, noblewomen gave up their positions to elope with them, and Emperors risked death to fight them. This thrilling popular history of...