Reading much of commentary over the past week on the riots, it's hard not to see a kind of mass catharsis – a feeling that at last, we have a big news hook to talk about big moral issues. The exact causes of the looting might be disputed, but most people seem to agree that, as a society, we're reaping what we've sown. The crisis has brought a sense of new freedom to discuss rights and wrongs.
In some ways, that's surprising – because most people have long had a very clear grasp of social problems.