Edmund Gustav Albrecht Husserl (April 8, 1859, Proßnitz, Moravia, Austrian Empire – April 26, 1938, Freiburg, Germany) was a philosopher and mathematician and the founder of the 20th century philosophical school of phenomenology. He broke with the positivist orientation of the science and philosophy of his day, yet he elaborated critiques of historicism and of psychologism in logic. Not limited to empiricism, but believing that experience is the source of all knowledge, he worked on a method of phenomenological reduction by which a subject may come to know directly an essence.Although born into a Jewish family, Husserl was baptized as a Lutheran in 1886. He studied mathematics under Karl Weierstrass and Leo Königsberger, and philosophy under Franz Brentano and Carl Stumpf. Husserl himself taught philosophy as aPrivatdozent at Halle from 1887, then as professor, first at Göttingen from 1901, then at Freiburg from 1916 until he retired in 1928. Thereafter he gave two notable lectures: at Paris in 1929, and at Prague in 1935. The notorious 1933 race laws of the Nazi regime took away his academic standing and privileges. Following an illness, he died at Freiburg in 1938.

          PHILOSOPY As a movement and a method, as a "first philosophy," phenomenology owes its life to Edmund Husserl (1859–1938), a German-Czech (Moravian) philosopher who started out as a mathematician in the late nineteenth century and wrote a book on the philosophy of mathematics, Philosophie der Arithmetik 1891 The Philosophy of Arithmetic). His view was that there was a strict empiricism, but on being shown (by the great German logician Gottlob Frege) that such an analysis could not possibly succeed, Husserl shifted his ground and started to defend the idea that the truths of arithmetic had a kind of necessity that could not be accounted for by empiricism. Thus, one of the main themes of his next book, Logische Untersuchungen (1913, 1921; The Logical Investigations), was a protracted argument against "psychologism," the thesis that truth is dependent on the human mind. Rather, Husserl argues that necessary truths are not reducible to our psychology. Phenomenology was Husserl's continuing and continuously revised effort to develop a method for grounding necessary truth.

Edmund Husserl occupied himself with the analysis of time-consciousness throughout his life. In this book, the three stages that may be distinguished in Husserl's occupation with this theme are discussed in their interrelationship. The first stage consists of a lecture manuscript from 1905; the second stage consists of the so-called Bernau manuscripts, research manuscripts that were written in 1917 and 1918; and the final stage consists of the so-called C-manuscripts, research manuscripts that were written in the late 1920s and the early 1930s. Central themes in the discussion of Husserl's phenomenology of time in this book are the connection between the analysis of time-consciousness and the analysis of phantasy-consciousness and image-consciousness; Husserl's position in the debate between A. Meinong and W. Stern concerning the possibility of the perception of time the self-constitution of absolute time-consciousness; the influence of Husserl's development of genetic phenomenology on his analysis of time-consciousness and the question of the intentional character of time-consciousness.