I n Venice, authorities tried to enforce social distancing by closing all the bars, and banning the sale of wine by merchant boats plying the canals. In Gloucester, the powers that be attempted to lock down the city by banning anyone travelling to and from Bristol, 40 miles south. But fights broke out among thirsty Italians, and Gloucester’s quarantine was broken – whether it was by people simply going on a trip to check their eyesight has, alas, gone unrecorded. In London, there was a dramatic rise in the sale of personal protective equipment, in the form of gloves. The story of the Black Death, as historian Thomas Asbridge shows in this magisterial survey, contains many such echoes of the Covid-19 pandemic, but it also shows just how relatively lucky we were a few years ago. The plague was far more lethal, and in the areas it spread between 1346 and 1353 it killed half the population. About 100m died: it was, Asbridge remarks, “the most lethal natural disaster in human history”.…