about 3.5 billion people. By contrast, for 2012, the World Bank reports that 21 percent of people worldwide, around 1.5 billion, live in extreme poverty, at or below $1.25 a day. Zygmunt Bauman has provocatively observed that the rise of the rich is linked to their capacity to lead highly mobile lives: "Mobility climbs to the rank of the uppermost among coveted values – and the freedom to move, perpetually a scarce and unequally distributed commodity, fast becomes the main stratifying factor of our late modern or postmodern time." See also Age stratification Caste system Class stratification Cultural hegemony Dominance hierarchy Egalitarianism Elite theory Elitism Gini coefficient Globalization Intersectionality Marxism Microinequity Rankism Religious stratification Social class Social inequality Socioeconomic status Social justice Systems of social stratification The Power Elite References Further reading Anthropological categories of peoples Social classes Social inequality Social status Conflict theory Economic problems Urban anthropology de:Soziale Schicht