During these centuries Rome gained in splendor and territory, then lost both. By the fourth century, the time of Constantine, the Roman Empire had changed so dramatically in geography, ethnicity, religion, and culture that it would have been virtually unrecognizable to Augustus. Rome’s legacy remains today in so many ways, from language, law, and architecture to the seat of the Roman Catholic Church. Strauss examines this enduring heritage through the lives of the men who shaped it: Augustus, Tiberius, Nero, Vespasian, Trajan, Hadrian, Marcus Aurelius, Septimius Severus, Diocletian, and Constantine. Over the ages, they learned to maintain the family business—the government of an empire—by adapting when necessary and always persevering no matter the cost.