René Descartes (1596-1650) has been called the father of modern philosophy. In this work, he outlines his "Method," which attempts to apply mathematical reasoning to all fields of inquiry. Starting with universal doubt, Descartes passes via his celebrated "I think, therefore I am," to the certainty of the existence of God.

Sayre Street Books offers the world's greatest literature in easy to navigate, beautifully designed digital editions.