Madness of crowds: When in Rome

“Caesar! We who are about to die salute you!” So, it is said, the gladiators of old addressed the Roman emperors before they went about the entertaining business of mutual butchering. It was drizzling and outside the grey-dun hulk of the Colosseum there was a small gaggle of modern Romans dressed up not as gladiators but as tacky-looking legionaries. I wanted to accost them and say: “You can do better than this: hanging around in this Gibbonian drag, hustling the odd euro by having your pictu...