In 1851, she met Elizabeth Cady Stanton, who became her lifelong friend and co-worker in social reform activities, primarily in the field of women's rights. In 1852, they founded the New York Women's State Temperance Society after Anthony was prevented from speaking at a temperance conference because she was female. In 1863, they founded the Women's Loyal National League, which conducted the largest petition drive in United States history up to that time, collecting nearly 400,000 signatures in support of the abolition of slavery. In 1866, they initiated the American Equal Rights Association, which campaigned for equal rights for both women and African Americans. In 1868, they began publishing a women's rights newspaper called The Revolution. In 1869, they founded the National Woman Suffrage Association as part of a split in the women's movement. In 1890, the split was formally healed when their organization merged with the rival American Woman Suffrage Association to form the National American Woman Suffrage Association, with Anthony as its key force. In 1876, Anthony and Stanton began working with Matilda Joslyn Gage on what eventually grew into the six-volume History of Woman Suffrage. The interests of Anthony and Stanton diverged somewhat in later years, but the two remained close friends.