mostly scientists from all disciplines. Here are some of the answers:
Steven Pinker(Psychologist, Harvard): The decline of violence
Haim Harari (Physicist): The evolutionary ability of humankind to do the right things.
Juan Enriquiz (CEO, Bitotechonomy): A Knowledge driven economy allows individuals to lead millions out of poverty in single generation.
John Gottman (Psychologist): When men are involved in the care o their own infants the cultures do not make war.
Stephen Kosslyn (Psychologist): Human intelligence can be increased, and can be increased dramatically.
Brian Goodwin (Biologist): Our ability as a species to respond to the challenge presented by peak Oil.