jointly credited, with Isaac Newton, with invention of differential calculus.
creator of a mechanical calculator
theory of monads
http://en.wikipedia.org/wiki/Leibniz
http://www.metaweb.com/wiki/wiki.phtml?title=Leibniz
review of The Courtier and the Heretic 0393058980 about GottfriedLeibniz and Baruch De Spinoza.
his alphabet of human thought sounds a lot like John Wilkins' work