 Although Hull House was replete with extraordinary minds, no one was likely to be as intellectually challenging to Addams as Florence Kelley (1859–1932). A Cornell graduate, Kelley translated Friedrich Engels’ The Condition of the Working Class in England and Karl Marx’s Free Trade into English. She was an active member of the Socialist Labor Party until the leadership, threatened by Kelley’s aggressive style, expelled her. A single mother with three children, Kelley found a home at Hull House, where she opened an employment center and began researching sweatshops for the Illinois Bureau of Labor Statistics. Kelley would later become the general secretary of the new Consumer’s League, an organization dedicated to using consumer pressure to ensure that safe and high-quality goods were manufactured. Kelley was one of the most distinguished social reformers of the early 20th Century.