Joined-Up Thinking'A powerful manifesto for the strength of "we" thinking' MARCUS DU SAUTOY 'A treasure of a book' ROWAN WILLIAMS 'Timely and engaging' IAN RANKIN 'Genius' BETTANY HUGHES In the history of humanity, almost everything we've ever achieved has been done by groups working together. Like a hive of bees, or a flock of birds, our social and interconnected brains are designed to function best together. This is collective intelligence: the way in which many