American social welfare system for the aged was established during the period of Roosevelt's New Deal in the 1930's.It has been more than 60 years since that time, and the system has gone through 4 stages successively: the forming period; the period of developing and improving; the naturing period and the reforming period. American economic development has played a decisive part in the development of policies, moreover ,the change in social trend of thought and the rotation of ruling parties also have exer...
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