“The web may have unleashed infinite possibilities of information and speed, but it still has to be absorbed, assimilated and considered by our clunky old brains if we are to develop any insight or understanding. It’s these last two which are now scarce, and crucially, what both require is concentration. The ability to focus, to persist with complexity and to consider ambiguity or uncertainty: these are the mental abilities we put at risk by flitting from one story to another.”