"We learn nothing from history except the infinite variety of men's behaviour," wrote A J P Taylor. Christopher Cook recalls the best-selling historian, columnist, TV personality and Oxford don. He looks at the writings of Thomas Babington Macaulay , one of the 19th century's most influential historians, and remembers the Pulitzer Prize-winner who became known as "Stalin's Apologist". Producer John Knight (Repeatedtomorrowat8.00pm)