Molly Russell was trapped by the cruel algorithms of Pinterest and Instagram | John Naughton

The coroner's verdict was a world first in citing social media as a causal factor in a death

As the inquest into the death of Molly Russell ground to its conclusion on Friday, what kept flashing like a faulty neon sign in one's mind was a rhetorical question asked by Alexander Pope in 1735: Who breaks a butterfly upon a wheel?" For Pope it was a reference to breaking on the wheel", a medieval form of torture in which victims had their long bones broken by an iron bar while tied to a Catherine wheel, named after St Catherine who was executed in this way.

For those at the inquest, the metaphor's significance must have been unmistakable, for they were listening to an account of how an innocent and depressed 14-year-old girl was broken by a remorseless, contemporary Catherine wheel - the AI-powered recommendation engines of two social media companies, Instagram and Pinterest.

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