For the Good of the WorldThe three biggest challenges facing the world today, in A. C. Graylings view, are climate change, technology, and justice. In his timely new book, For the Good of the World, he asks: can human beings agree on a set of values that will allow us to confront the numerous threats facing the planet, or will we simply continue with our disagreements and antipathies as we collectively approach our possible extinction? As every day brings new stories about