By Caroline Moorehead
Chatto & Windus £20
Near the centre of Bolzano in northern Italy stands a triumphal arch erected by Mussolini's Fascists in 1928. In that largely German-speaking town, it was seen as provocation, and today it is surrounded by a high fence to deter vandals.
One of the fascinating themes to emerge from Caroline Moorehead's new book is the way Italian unity, so triumphantly won in the 19th century, was picked apart in the 20th by
