The Rev. Erik J. Richtsteig is the pastor of St. James the Just Catholic Church in Ogden, Utah. He was leading Mass in June 2013 when a man with a gun entered his sanctuary and shot a parishioner.

Brian Green is the director of technology ethics at the Markkula Center for Applied Ethics at Santa Clara University. He studies how emerging technologies, including artificial intelligence, affect human life.

Ilia Delio is a theologian and writer who is interested in the intersection of faith and science. She is a Franciscan sister.

Cardinal John Olorunfemi Onaiyekan is the Metropolitan Archbishop of Abuja, Nigeria. He took part in a 2018 conference on religion and the environment hosted by Orthodox Ecumenical Patriarch Bartholomew I of Constantinople.

Tomás Insua is the co-founder and executive director of the Global Catholic Climate Movement. Insua grew up in Argentina and now lives in Rome. He can be contacted through Reba Elliott, the organization’s communications director.