The Good Friday agreement is under attack. Can we really risk ditching it? | Ian Jack

How quickly Brexiteers seem to have forgotten the past. No one wants to see troops on the streets of Northern Ireland againMany years ago, and mainly because of the way it looked, I bought a book called Handbook of the Ulster Question, which was published by the Stationery Office, Dublin, in 1923. It has a green cardboard binding and a front cover decorated in the Celtic revival style, which the Irish Free State also adopted for its postage stamps.An empty wallet inside the back cover once