In , historian Yuval Noah Harari explores the potential future of humanity as we transition from Homo sapiens to a new, godlike species he calls Homo deus . Building on the themes of his previous bestseller, Sapiens , Harari argues that having largely conquered the historical "big three" obstacles—famine, plague, and war—humanity is now pivoting toward a new agenda focused on immortality, happiness, and divinity. Core Themes and Arguments 'Homo Deus' by Yuval Noah Harari