Twenty years ago Ulrich Beck published Risk Society , a book that called our attention to the dangers of environmental catastrophes and changed the way we think about contemporary societies. During the last two decades, the dangers highlighted by Beck have taken on new forms and assumed ever greater significance.

We live in a world that is increasingly difficult to understand. It is not just changing: it is metamorphosing. Change implies that some things change but other things remain the same capitalism changes, but some aspects of capitalism remain as they always were. Metamorphosis implies a much more radical transformation in which the old certainties of modern society are falling away and something quite new is emerging. To grasp this metamorphosis of the world it is necessary to explore the new beginnings, to focus on what is emerging from the old and seek to grasp future structures and norms in...