Mihaly Csikszentmihalyi is known for his work in the field of positive psychology and his theory of flow, which he outlined in his seminal 1990 book "Flow: The Psychology of Optimal Experience". He is often referred to as the "father of flow" due to his pioneering work in this area. Csikszentmihalyis theory of flow describes a state of consciousness where individuals are completely absorbed in an activity, especially one that involves their creative abilities. During this "optimal experience," they feel strong, alert, in effortless control, unselfconscious, and at the peak of their abilities. Csikszentmihalyis work has focused on human well-being and the conditions that enable people to flourish and live satisfying lives. He was a researcher, educator, public speaker, and co-director of the universitys Quality of Life Research Center. Csikszentmihalyi was also the co-founder of the field of positive psychology, which focuses on happiness, well-being, and positivity.