John Dewey (1859-1952) was an American philosopher who was a leading proponent of pragmatism. Pragmatism is a philosophy that emphasizes practical experience over abstract theorizing. It focuses on what works over theoretical correctness. Key principles of pragmatism include giving importance to action and experience, believing in change and growth through interaction and environment, and focusing on means rather than ends. Pragmatism rejects metaphysics and believes knowledge comes from experience. It also believes values are determined by the consequences of actions. Pragmatism influenced progressive education by emphasizing learning by doing, integrating subjects, and using methods like the project method.