Gary Klein is a research psychologist famous for pioneering in the field of naturalistic decision-making. He studied how people make life or death decisions under extreme time pressure and uncertainty, especially firefighters, military generals or ICU nurses he has observed on the field. He is the best selling author of « Sources of Power » edited by MIT Press, « Streetlights and Shadows » and most recently « Seeing What Others Don’t: The Remarkable Ways We Gain Insights ».