John Sellars is a British philosopher and one of the leading modern scholars of ancient philosophy, particularly Stoicism. He is a lecturer in philosophy at Royal Holloway, University of London, and a research fellow at King’s College London. Sellars is also a co-founder of the London Centre for Ancient Philosophy and is involved with organizations such as Modern Stoicism and The Aurelius Foundation, which aim to bring ancient Stoic teachings to a wider audience.

His work focuses on how ancient Stoic principles can be applied to contemporary life, with books such as The Art of Living and Marcus Aurelius. Sellars’ writing is known for making complex philosophical ideas accessible and practical, encouraging readers to integrate Stoic wisdom into their daily routines to live more fulfilling lives.