Written in 1906, "Before Adam" is a bit of a departure from London's other novels. It revolves around the dreams of a young boy, dreams that involve racial memories and the knowledge of his prior existence as a man-like creature named Big Tooth living in prehistoric times. "These are our ancestors, and their history is our history. Remember that as surely as we one day swung down out of the trees and walked upright, just as surely, on a far earlier day, did we crawl up out of the sea and achieve our first adventure on land."

John Griffith "Jack" London (January 12, 1876 – November 22, 1916) was an American author, journalist, and social activist. He was a pioneer in the then-burgeoning world of commercial magazine fiction and was one of the first fiction writers to obtain worldwide celebrity and a large fortune from his fiction alone. Some of his most famous works include The Call of the Wild and White Fang, both set in the Klondike Gold Rush, as well as the short stories "To Build a Fire", "An Odyssey of the North", and "Love of Life". He also wrote of the South Pacific in such stories as "The Pearls of Parlay" and "The Heathen", and of the San Francisco Bay area in The Sea Wolf.