Robert Song is a Christian ethicist based at Durham University in the United Kingdom. He studies the moral implications of medical interventions such as gene editing.

Erik Parens is a senior research scholar with the Hastings Center, a nonpartisan, nonprofit bioethics research institute. He leads investigations into disability rights and what human flourishing means in the era of gene editing. Parens is the author of Shaping Our Selves: On Technology, Flourishing and a Habit of Thinking.