Theologus Autodidactus (~1270)
https://www.youtube.com/watch?v=_sVK4vpoWus
Originally titled The Treatise of Kāmil on the Prophet’s Biography, Ibn al-Nafis’ theological novel was released in English as Theologus Autodidactus (or, The Self-Taught Theologian). That’s because the story begins with a tween named Kamil who spontaneously generates on an island, with no idea of civilization, only to be found by scholars. Kamil uses his education and pure logic to conclude the existence of God and the factuality of Islam, but then he uses that same logic to reason out the end of the world, which would see the end of the sun rotating around the Earth (as was assumed) and complete social breakdown, giving the novel a literally apocalyptic ending.
