Katie Blair is right to say that we need Margo to point out how bad the country has become. But the reason I mentioned 'Imagining Australia' was that we need to do more than get mad. Macgregor Duncan and the other authors have this great metaphor for Australian public debate -- the hedgehogs and foxes.

They reckon we have hedgehogs, who only think of the big picture; and foxes, who only think about policy detail. And on the Left, the two groups are talking past one another. Maybe between us all, we can work out a way to fix that.