“Growth hacking isn't some proprietary technical process shrouded in secrecy. In fact, it has grown and developed in the course of very public conversations. There are no trade secrets to guard.”

American marketer and author

Ryan Clark Holiday is an American marketer and author. He became known for presenting Stoicism as a practical philosophy for modern life, especially through the teachings associated with the Roman emperor Marcus Aurelius. His work centers on making Stoicism accessible to contemporary readers and on marketing ideas about disciplined, reflective living. He is known for promoting that tradition in a way that connects ancient philosophy with present-day concerns.