1. Program for Evolutionary Dynamics, Harvard University, Cambridge, MA 02138, USA.
2. Cultural Observatory, Harvard University, Cambridge, MA 02138, USA.
3. Institute for Quantitative Social Sciences, Harvard University, Cambridge, MA 02138, USA.
4. Department of Psychology, Harvard University, Cambridge, MA 02138, USA.
5. Department of Systems Biology, Harvard Medical School, Boston, MA 02115, USA.
6. Laboratory-at-Large, Harvard University, Cambridge, MA 02138, USA.
7. Computer Science and Artificial Intelligence Laboratory, Massachusetts Institute of Technology (MIT), Cambridge, MA 02139, USA.
8. Harvard Medical School, Boston, MA, 02115, USA.
9. Harvard College, Cambridge, MA 02138, USA.
10. Google, Mountain View, CA 94043, USA.
11. Houghton Mifflin Harcourt, Boston, MA 02116, USA.
12. Encyclopaedia Britannica, Chicago, IL 60654, USA.
13. Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA 02138, USA.
14. Department of Mathematics, Harvard University, Cambridge, MA 02138, USA.
15. Broad Institute of Harvard and MIT, Harvard University, Cambridge, MA 02138, USA.