Throughout the 1850s, Ernestine Rose was one of the best-known female activists in the United States, more famous than either Elizabeth Cady Stanton or Susan B. Anthony. Rose worked not only for feminism, but also for free thought and abolition. As a Jewish, atheist, foreign woman, who left the United States in 1869, Ernestine Rose was written out of American history. Her evolution from a traditional Polish-Jewish childhood to an adult life as a radical international feminist and freethinker deserves to be remembered.