Jack London (1876-1916) was an American novelist, journalist, and social activist. A pioneer in the then-burgeoning world of commercial magazine fiction, he was one of the first fiction writers to obtain worldwide celebrity and a large fortune from his fiction alone. London was a passionate advocate of unionization, socialism, and the rights of workers. His most famous works include The Call of the Wild and White Fang, both set in the Klondike Gold Rush.