Sergiu Margan is an independent researcher, philosopher, and Christian writer whose work bridges theology, theodicy, and metaphysics in search of a coherent understanding of God, freedom, and moral truth. He is best known for developing The Redemption Optimization, a groundbreaking framework that formalizes the problem of evil and moral coherence in mathematical terms. His forthcoming book, Unreasonable Doubt, continues this exploration, addressing faith, logic, and the boundaries of human understanding. Sergiu lives in the United Kingdom with his wife, Andrea, and their two children, Luca and Bella, whose love and curiosity inspire his pursuit of truth and meaning.