David Masci is a senior researcher at the Pew Research Center’s Religion & Public Life Project in Washington, D.C. Masci previously worked for 14 years as a journalist for Congressional Quarterly.

Read a July 17, 2008 Pew Forum research report on the different religious views on stem cell research.

James S. Liebman is Simon H. Rifkind Professor of Law at Columbia Law School in New York. He specializes in criminal law, ethics and capital punishment.

Read an Oct. 31, 2012 article that describes the conflict between stem cell research and religion.

Stephen P. Garvey is a professor at Cornell Law School in New York who has taught courses on capital punishment and the philosophy of criminal law. He has written numerous articles on the death penalty and represented death row inmates.

Joseph Bottum is an author based in South Dakota and a former editor of the conservative-leaning interfaith journal First Things. Contact through Random House publicist Katie Moore.

Read a Feb. 15, 2005, USA Today story about how states are struggling to weigh moral values while pursuing legislation to attract stem cell research.

Robert Blecker is a professor at New York Law School and an expert on capital punishment.

Carol Steiker is a professor at Harvard Law School and an expert on the death penalty and criminal law.