The Story of Mankind revolutionized former methods of telling history. It received the first Newbery medal award for the most distinguished contribution to American literature for children. Nevertheless, critics and public alike hailed it as a book for all ages. Van Loon recounts history as living news, relating everything in the past to the present. He writes informally, making world history wonderfully alive and exciting.
The author himself gives the best possible resume of the book when he states his reasons for writing it: "The entrance of America upon the scene of international politics as the most important actor, destined to 'play the lead' for the next five hundred years, convinced me that a proper and reasonable understanding of historical cause and effect was the most important factor in the lives of the rising generation. And so my book treats the entire history of the human race as a single unit. It begins in the dim End hardly understood realm of the earliest past; it can be continued forever."