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In page Retirement:
"Retirement, or the practice of leaving one's job or ceasing to work after reaching a certain age, has been around since around the 18th century. Prior to the 18th century, humans had an average life expectancy between 26 and 40 years.[1][2][3][4] In consequence, only a small percentage of the population reached an age where physical impairments began to be obstacles to working.[citation needed] Countries began to adopt government policies on retirement during the late 19th century and the 20th century, beginning in Germany under Otto von Bismarck.[5]
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