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Joseph Fletcher
Joseph Francis Fletcher (April 10, 1905 in Newark, New Jersey - October 28, 1991 in Charlottesville, Virginia) was an American professor who founded the theory of situational ethics in the 1960s, and was a pioneer in the field of bioethics. Fletcher was a leading academic proponent of the potential benefits of abortion, infanticide, euthanasia, eugenics, and cloning. Ordained as an Episcopal priest, he later identified himself as an atheist.
Source: Wikipedia