Michael Sandel interviewed by Andrew Marr on BBC Radio 4's Start the Week. Listen again here. Sandel is the first one on the programme to be interviewed. He discusses his ideas about a New Citizenship, the idea that we need to re-invigorate public moral debate. A key area for him is the way in which many activities have been made into commercial transactions (e.g. carbon trading, buying and selling blood, wombs for hire, etc.) and the morally corrupting impact of this.