When Richard Steele remarked that the greatest Evils in human Society are such as no Law can come at, he was not able to forsee the spectacular success of John Gay's satire of society, the administration of law and crime, politics, the Italian opera and other topics. Gay's The Beggar's Opera, with its mixture of witty dialogue and popular songs, was imitated by 18th century writers, criticized by those on the seats of power, but remained a favourite of the English theatre public ever since. With N. Playfair's 1920 revival and B. Brecht's and K. Weill's 1928 Dreigroschenoper, Gay's play has...