The final moments of his 1993 masterpiece Arcadia meld the play’s two time schemes (1812 and the present day) and its two intellectual themes (the 19th-century Romantic movement and chaos theory) in a gloriously sexy waltz. The scene has always seemed the quintessence of the best of Englishness, a miraculous concoction of humour, erudition, carnality, nonsense and emotion. Yet it was written by a child-exile from Czechoslovakia, who spent his early years in the Indian Himalayas, a boy who, like Shakespeare, never went to university but ended up not only the greatest British playwright of his generation but an emblem...