The Armenian genocide, the massacres of the Pontic Greeks and the agreed 'exchanges' of Greek and Turkish populations after the sack of Smyrna illustrated with a terrible clarity the truth of the Archbishop of Aleppo's warning: when a multi-ethnic empire mutated into a nation state, the result could only be carnage. It was as if, for the sake of a spuriously modern uniformity, the basest instincts of ordinary men were unleashed in a kind of tribal bloodletting.