Chris Argyris was a behavioral scientist born in 1923 who received degrees in psychology, economics, and organization behavior. He was a professor at Yale and Harvard, consulting for companies like IBM and DuPont. Argyris contributed theories of action regarding espoused theories versus theories-in-use, and single-loop versus double-loop learning. His work showed that people's actual behaviors often contradict their stated beliefs, and that double-loop learning, questioning underlying policies and objectives, allows organizations to learn from errors and uncover truths.