In 1902, Jack London purchased some secondhand clothes and, posing as a stranded American sailor, set out to discover how the London poor lived. His research makes shocking reading. Moving through the slums as one of the poor; eating, drinking, and socializing with the underclass; lining up to get into a flophouse, London was scandalized and brutalized by the experience of living rough in Britain’s capital. His clear-eyed reflections on the iniquities of class are a shaming testament to the persistence of social inequality in modern times.

Jack London (born John Griffith Chaney, January 12, 1876 – November 22, 1919) 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. 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. London was a passionate advocate of unionization, socialism, and the rights of workers. He wrote several powerful works dealing with these topics, such as his dystopian novel The Iron Heel, his non-fiction exposé The People of the Abyss, and The War of the Classes.