A number of the chapters in this volume began as presentations at a conference celebrating the many contributions of Allan Gotthelf to the study of ancient philosophy that took place on October 1–3, 2004. It gives the editors great pleasure to thank the many individuals and organizations who contributed to the success of that event. At the University of Pittsburgh both financial and organizational support were provided by the Center for Philosophy of Science and its staff, Karen Kovalchick, Joyce MacDonald, and Carol Weber. Further financial support was provided by the University of Pittsburgh's School of Arts and Sciences, and Departments of History and Philosophy of Science and Philosophy, and by the Rutgers University Endowment for Ancient Philosophy. Alec Stewart, Dean of the Honors College of the University of Pittsburgh kindly made its remarkable rooms on the thirty-fifth and thirty-sixth stories of the Cathedral of Learning available for a gala reception, funding for which was provided by the Anthem Foundation for Objectivist Scholarship.

We would like to thank Michael Sharp for his support and patience in working with us at all stages on the production of the present volume; Cambridge University Press's referees, whose suggestions helped to improve the final product; Elizabeth Hanlon and Sarah Roberts for their careful handling of editorial matters; Jan Chapman for her skillful copy-editing; Benjamin Goldberg for help in preparing the indexes; and finally, the Syndics of Cambridge University Press for approving this volume for publication.