David Sedaris, the current king of humourists, is often not funny at all
Since the 17th century, a ‘humourist’ has been a witty person, and especially someone skilled in literary comedy. In 1871, the Athenaeum said that Swift had been ‘an inimitable humourist’. But in modern usage the term seems to describe a specifically American job title: someone who specialises in writing short prose pieces whose only purpose