Acknowledgment

The authors would like to express their deep gratitude to the members of the Advisory Committee, who met with us many times and commented on numerous drafts of this text. We express our thanks to those members who did extensive and crucial drafting. If the pamphlet has value, most of the credit belongs to our generous advisors.

We are also very grateful to the American Academy of Arts and Sciences, which acted as the convener for our group and provided start-up funds. In particular, Leslie Berlowitz and Corinne Schelling participated in our discussions and provided valuable ideas and very helpful administrative support.

Finally, our thanks to Carnegie Corporation of New York for providing a grant that has made possible the printing and distribution of this pamphlet as well as public outreach connected to this project.