Michael J. Sandel shows how a surer grasp of philosophy can help us to make sense of politics, morality, and our own convictions.

Should we financially reward children for good marks? Is it ethical to pay people to donate organs? What about hiring mercenaries to fight our wars, outsourcing inmates to for-profit prisons or selling citizenship? In this title, the author asks: Isn't there something wrong with a world in which everything is for sale?