 Gotthelf published many articles and reviews in ancient philosophy and science, especially on the philosophical significance of Aristotle's scientific methodology and biology.In the 1980s, he co-organized numerous international conferences on Aristotle's biological and philosophical thought, including the 1988 National Endowment for the Humanities Summer Institute on Aristotle's Metaphysics, Biology, and Ethics (with Michael Frede and John Cooper).He edited the Festschrift in honor of David M. Balme, "Aristotle on Nature and Living Things" and co-edited (with James G. Lennox) "Philosophical Issues in Aristotle's Biology" (Cambridge University Press, 1987).