David Hull died on August 12, 2010. He played a foundational role in making philosophy of biology a respected field of philosophy of science, and respected in the life sciences. He was a critical early supporter of this journal, helping and supporting Michael Ruse in a myriad of ways. He was justly famous within the field for his professional and personal generosity. I can testify to this personally; in the very early days of my career in philosophy of biology, on my first study leave, he hosted me (rent-free!) in his house for 3 months; he made sure I met everyone there was to meet in the Chicago philosophy of biology world; and he read and commented on every line that I wrote. He was a wonderful man, and fine philosopher, one who played a vital role in shaping the field. Unfortunately, I met him only after the AIDS epidemic that drank the joy from his life, and some of the vitality from his work.

We begin this issue with two tributes; one from his companion in arms from the early days of the field, Michael Ruse. The other is a representative of the matured field, Peter Godfrey-Smith.