Robert Jay Lifton is an American psychiatrist and author, chiefly known for his studies of the psychological causes and effects of wars and political violence, and for his theory of thought reform. He was an early proponent of the techniques of psychohistory.

Nicholas Keynes Humphrey is an English neuropsychologist based in Cambridge, known for his work on evolution of primate intelligence and consciousness. He studied mountain gorillas with Dian Fossey in Rwanda; he was the first to demonstrate the existence of "blindsight" after brain damage in monkeys; he proposed the theory of the "social function of intellect". He is the only scientist to have edited the literary journal Granta.