This is a print on demand edition of a hard to find publication. The U.S. accounts for 4.6% of the world¿s population. By the end of the decade, the U.S. population is expected to reach twice its 1950 level of 152 million. This report highlights some of the demographic changes that have already occurred since 1950 and illustrates how these and future trends will reshape the nation through 2050. Contents: (1) Population Size and Growth: Fertility; Mortality; Net Immigration; (2) The Changing Age Profile; (3) Race and Ethnicity: Race; Hispanic Origin; (4) Some Policy Considerations: Work, Retirement, and Pensions; Private Wealth and Income Security; The Fed. Budget and Intergenerational Equity; The Health of an Aging Population; Immigration Policy; America¿s Changing Color Lines. Charts and tables.