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The present volume contains many of the papers presented at a four-day conference held by the Husserl-Archives in Leuven in April 2009 to c- memorate the one hundred and ?ftieth anniversary of Edmund Husserl’s birth. The conference was organized to facilitate the critical evaluation of Husserl’s philosophical project from various perspectives and in light of the current philosophical and scienti?c climate. Still today, the characteristic tension between Husserl’s concrete and detailed descriptions of consciousness, on the one hand, and his radical philosophical claim to ultimate truth and certainty in thinking, feeling, and acting, on the other, calls for a sustained re?ection on the relation between a Husserlian phenomenological philosophy and philosophy in general. What can phenomenological re?ection contribute to the ongoing discussion of certain perennial philosophical questions and which phi- sophical problems are raised by a phenomenological philosophy itself? In addition to addressing the question of the relation between p- nomenology and philosophy in general, phenomenology today cannot avoid addressing the nature of its relation to the methods and results of the natural and human sciences. In fact, for Husserl, phenomenology is not just one among many philosophical methods and entirely unrelated to the sciences. Rather, according to Husserl, phenomenology should be a “?rst philosophy” and should aim to become the standard for all true science.