Renatus Cartesius

Rene Descartes (1596 - 1650), who also published under the latinized name Renatus Cartesius, operated on the assumption that understanding of the physical world was contingent on the formulation of a sound metaphysical model or logical framework, drawing its first principles from reason. As the most fundamental principle he accepted a conservation law that demands the quantity of motion in the universe to remain constant. He equated matter with extension, which must therefore fill all space. 

Descartes, Rene, also known as Renatus Cartesius (1596-1650) French philosopher, mathematician, physicist, and writer who spent most of his adult life in the Dutch Republic. He has been dubbed the Father of Modern Philosophy . 

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