In Origin Story: A Big History of Everything, historian David Christian presents a comprehensive narrative that spans 13.8 billion years, from the Big Bang to the present. Christian introduces the concept of "Big History," which integrates insights from various disciplines—including astronomy, geology, biology, and anthropology—to explore the interconnectedness of events that have shaped our universe and human existence. By focusing on pivotal thresholds of increasing complexity, such as the formation of stars, the emergence of life, and the development of human societies, Christian reveals the underlying patterns that connect all aspects of history. This approach offers readers a unified perspective on the past, emphasizing the shared origins and collective journey of humanity.