Richard Henry Popkin (December 27, 1923 – April 14, 2005) was an American academic philosopher who specialized in the history of enlightenment philosophy and early modern anti-dogmatism. His 1960 work ''The History of Scepticism from Erasmus to Descartes'' introduced one previously unrecognized influence on Western thought in the seventeenth century, the Pyrrhonian Scepticism of Sextus Empiricus. Popkin also was an internationally acclaimed scholar on Christian millenarianism and Jewish messianism.
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