Daniel Kahneman was a Nobel Prize-winning psychologist and economist renowned for his groundbreaking work in behavioral economics. Often called the “grandfather” of the field, he revolutionized our understanding of human judgment and decision-making by challenging the assumption of rationality. His pioneering research on cognitive biases and prospect theory, summarized in his bestseller Thinking, Fast and Slow, established him as a premier authority on the psychological foundations of economic behavior and smart decision-making.