The International Handbook of Population Aging is the first comprehensive volume to examine research on a wide array of the profound implications of population aging. Global population aging is one of the most important issues facing human societies in the early twenty-first century. Population projections show that the proportion of the worlds population over age 60 will double between 2000 and 2050, and that about one-third of the people living in developed countries will be over age 60 in 2050. Already there are countries in Europe and Asia where the number of people over age 60 exceed the number of children, and by 2050 some of these countries will have twice as many old people as children. As noted by the 2002 UN World Assembly on Ageing Report, this global trend in population aging is unprecedented in human history, is pervasive across societies, is enduring (there is no going back to younger populations), and has profound implications for human beings.