INEQUALITY is growing. Disparities are increasing—between the rich and poor in individual countries, and until recently, between countries. The global financial crisis is keeping real incomes stagnant in advanced economies but it probably narrowed global inequality between citizens of the world, because most developing countries continued with strong growth. Some say that inequality doesn’t matter as long as markets are working efficiently, or if everyone is getting more. Others argue that inequality hampers growth, or that only so much disparity is ethically acceptable.