In recent years, there has been a resurgence of interest in the issue of inequality. Part of this resurgence can be traced to new evidence of persistent and widening wealth gaps. Average incomes may be converging globally as a result of high growth in emerging markets, stronger growth in many poor countries, and slow growth in rich countries. However, the evidence also shows that within countries a parallel process of income divergence, marginalization and rising inequality is also taking place. Put differently, the rising tide of global prosperity is not lifting all boats.