Ryan Holiday is an American author, marketer, and entrepreneur known for his work in the field of stoicism and modern philosophy. He has written several best-selling books, including The Obstacle Is the Way and The Daily Stoic, which explore how ancient wisdom can be applied to contemporary life. In addition to his writing, Holiday has worked as a media strategist for various companies and public figures. He is the founder of The Daily Stoic, a website dedicated to sharing insights on stoicism, and he frequently speaks on topics related to personal development and resilience.