The SAGE Encyclopedia of World Poverty, Second Edition addresses the persistence of poverty across the globe while updating and expanding the landmark first edition, originally published in 2006 prior to the economic calamities of 2008. For instance, while continued high rates of income inequality might be unsurprising in developing countries such as Mexico, the Organization of Economic Co-operation and Development (OECD) reported in May 2013 even countries with historically low levels of income inequality have experienced significant increases over the past decade, including Denmark, Sweden, and Germany. The UN and the World Bank also emphasize the persistent nature of the problem. It is not all bad news. In March 2013, the Guardian newspaper reported, “Some of the poorest people in the world are becoming significantly less poor, according to a groundbreaking academic study which has taken a new approach to measuring deprivation. The report, by Oxford University’s poverty and human development initiative, predicts that countries among the most impoverished in the world could see acute poverty eradicated within 20 years if they continue at present rates.” On the other hand, the UN says environmental threats from climate change could push billions more into extreme poverty in coming decades. All of these points lead to the need for a revised, updated, and expanded edition of the Encyclopedia of World Poverty, Second Edition.