Some years back, Paolo Landri, Romuald Normand and I were at an ECER conference, and we had a discussion on how we were not hearing anything new. Problems in the field of education seemed to be getting more intense, diverse and complex. But the theories with which we were interrogating them, or trying to address them, seemed to be the same old ones that have been used for decades. That is how this book has come about – we wanted to explore the central problem of describing the kinds of issues are we currently facing and understanding what kinds of theories they demand.