Ryan Holiday is an American author, media strategist, and modern interpreter of Stoic philosophy. He is best known for bestselling books such as The Obstacle Is the Way, Ego Is the Enemy, and Stillness Is the Key, which apply ancient Stoic principles to modern challenges of leadership, resilience, and personal development. Holiday’s work blends history, philosophy, and practical wisdom, making Stoicism accessible to a wide audience of entrepreneurs, athletes, and lifelong learners seeking clarity and discipline in both work and life.