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Michael H Hart

Michael H. Hart (born 1932) is an American author. Among his books are, The 100: A Ranking of the Most Influential Persons in History (1978; revised edition: 1992 ), A View from the Year 3000 (1999), and Understanding Human History (2007). He earned a Ph.D. in astronomy from Princeton University. He also has degrees in law, computer science, and physics. Dr. Hart is married and has two children.