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Do not give Isis what it wants

"Severed heads on public display are not only acts of medieval nihilism, they are also calculated acts of strategic orchestration"

By Robert Fry  

Abu Bakr al Baghdadi, leader of IS. © Balkis Press/ABACA/Press Association Images

In the late spring of 53 BC, Marcus Lucinius Crassus led seven Roman legions to catastrophe in Mesopotamia. Immobile heavy infantry had no response to the Parthian horse archers who could release their weapons from beyond the range of anything in the Roman inventory. This tactical advantage would later enter the English language: a Parthian Shot signifies the discharge of a missile from an…

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