Modern Stoicism is a contemporary adaptation of the ancient philosophy of Stoicism, which originated in Greece around the 3rd century BCE. It emphasizes the importance of rational thinking, self-control, and virtue as a means to achieve a fulfilling life. Practitioners focus on distinguishing between what they can control and what they cannot, promoting resilience in the face of challenges. Today, Modern Stoicism has gained popularity through various resources, including books, online courses, and communities. Influential figures like Ryan Holiday and Massimo Pigliucci have contributed to its resurgence, making Stoic principles accessible for personal development and mental well-being in the modern world.