Rationalism. Rationalism is a philosophical movement which gathered momentum during the Age of Reason of the 17th Century. It is usually associated with the introduction of mathematical methods into philosophy during this period by the major rationalist figures, Descartes, Leibniz and Spinoza.
<em>In other words rationalism is a movement gathering strength or power, in the Age of Reason. It was joined with the introduction of mathematics. </em>
