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Gottfried Wilhelm Leibniz (1646-1716) was a German rationalist philosopher and polymath. (Polymaths, are those who excel in a wide variety of subjects or fields – Leonardo da Vinci, and Hildegarde of Bingen are also regarded as polymaths. Polymaths are also called Renaissance men or Homo Universalis.)
Leibniz invented the calculus independently of Newton, and we owe present day notations within differential and integral calculus to Leibniz. and Leibniz's philosophy is best remembered for his monadology.