Jack Mezirow was an American educator and philosopher best known for his work in adult education and transformative learning. He developed the concept of transformative learning theory, which emphasizes how individuals can change their perspectives through critical reflection and dialogue. His ideas have significantly influenced adult education practices and theories. Mezirow's work highlighted the importance of experience in learning, suggesting that adults learn best when they can connect new information to their own life experiences. He believed that transformative learning occurs when learners challenge their assumptions and beliefs, leading to personal growth and a deeper understanding of themselves and the world around them.