There is a book titled "The Sunflower" by St. John of Tobolsk that addresses these very questions from a Christian perspective. I could not do anything but just post quotes from it. What I can tell you is that sitting here in the Ukraine War, "The Sunflower" has been a source of great edification on why this is happening on a grand and individual scale. Or, at least, it gives perspective and hope in the midst of evil.