Winston Churchill helped lead Britain through the Second World War, wrote millions of words, and won the Nobel Prize in literature. He also took a nap every afternoon.And he didn't simply doze off in an armchair. He got undressed and climbed into bed, equipped with custom-fitted beeswax earplugs to shut out the bustle of wartime London. His naps were sacrosanct, even as the demands of running a country at war frequently kept him working well pas…