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 recent decades, market values have impinged on almost every aspect of life - medicine, education, government, law, even family life. We have drifted from having a market economy to being a market society. In What Money Can't Buy Michael Sandel asks: Isn't there something wrong with a world in which everything is for sale? And how do we protect the things that really matter?