The Nature Conservancy has always used science to guide its actions. But in recent years, the Conservancy has placed increasing emphasis on publishing the lessons it has learned and on the results of its scientific analyses. Collected here are my personal top 100 favorite pieces of Conservancy-authored research from 2000 onward — selected either for their impact as gauged by number of science citations (in parentheses after the older articles) or because I personally think they are particularly innovative and warrant attention. Because of copyright laws, we cannot simply distribute the PDFs of all of these articles, but most are available for free or purchase at the links provided in the PDF. The names of Conservancy authors are in bold. We will endeavor to update the list as newer papers come to clearly warrant inclusion. If you would like to learn more about TNC science, contact me or our Director of Science Communications Bob Lalasz.