As court advisor to the Elector of Mainz, he drafted the failed Egyptian Plan, a proposal to divert the armies of Louis XIV away from Holland and Germany.  
As court advisor to the Elector of Mainz, he drafted the failed Egyptian Plan, a proposal to divert the armies of Louis XIV away from Holland and Germany.  A chance meeting with Huygens led to his immersion in mathematics, through which he co-discovered the determinant and named the function.  However, he may be better known for founding a philosophical system based on the principles of non-contradiction and sufficient reason, combining the inorganic, the organic, and the divine into one structure.  FTP, name this philosopher a proponent of monadology and co-discoverer of calculus.
As court advisor to the Elector of Mainz, he drafted the failed Egyptian Plan, a proposal to divert the armies of Louis XIV away from Holland and Germany.  
Gottfried Wilhelm Leibniz