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Meditations on First Philosophy
Meditations on First Philosophy was created in 1641.
Rene Descartes
The Ontological Argument
Descartes hopes to find out what he can know for certain, without any doubt, about the world and nature.
Rene Descartes invented the famous Cartesian coordinate system.He worked in the field of analytic geometry.
Rene desscartes was the father of mathematics.
Ethics plays no direct role in Descartes's MEDITATIONS ON FIRST PHILOSOPHY; first philosophy is about ontology and epistemology, not ethics. However, Descartes states in his letter of dedication that his motivation is to provide incentive for people to live better because "in this life there are often more rewards for vices than for virtues" [Cress translation]. .
== == Oddly enough, the place now called Descartes. Initially called La Haye en Touraine, the town was renamed La Haye-Descartes in 1802 in his honour, and then renamed again to Descartes in 1967.
Rene Descartes' most important published books include Discourse on Method (1637), Meditations on First Philosophy (1642), and Principles of Philosophy (1644).
Modern science also uses a clear method to discover answers to questions. (Apex)
Short answer: Descartes' doubt was like WWI - the doubt to end all doubt. Only by doubting everything could Descartes hope to find anything that was certain (even if the only certainty is that nothing else is certain!).