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Anne McElvoy explores the roads not taken with the historian Richard Evans. Counterfactual history began as an Enlightenment parlour game and has become a serious academic pursuit, but Evans argues against endless speculation as to what might have been. The final meeting between Lawrence of Arabia and Faisal I of Iraq was an anti-climax which belied their history. The biographers of these two leaders, Scott Anderson and the former Iraqi politician Ali Allawi, place these men at the centre of the making of the modern Middle East. The writer Malu Halasa offers an alternative view of the violent events in Syria as she curates a book of political posters, comic strips, blogs and plays. Producer: Katy Hickman.