Edmund Husserl (1859–1938) is recognized as the founder of phenomenology as a systematic method of philosophy. He also created an important and new perspective on logic and mathematics, which distinguished them from empirically discovered psychological “rules of thought.” Husserl’s major works are Logical Investigations (1900), The Idea of Phenomenology (1907), and Ideas Pertaining to a Pure Phenomenology and to a Phenomenological Investigation (1913).