The findings, conclusions, and opinions stated or implied in this publication are those of the authors. They do not necessarily reflect the views of the Board of Directors, Council, or membership of the American Association for the Advancement of Science. To all my friends who are here-wise, good-humored, supportive, indulgent, and loyally critical-and to those who live in my memory, I say: Thank you; I am grateful. All of us remain grateful to Bill for that challenge and for his long service as trustee of science.