Sapiens: A Brief History of Humankind is a book by Yuval Noah Harari that explores the history of our species, Homo sapiens. It covers a wide range of topics, including the cognitive revolution, the agricultural revolution, and the scientific revolution. Harari examines how humans have evolved and shaped the world around them, from the development of language to the rise of empires. This thought-provoking book challenges our understanding of what it means to be human and offers insights into the future of our species.