Quakers, or Friends as they call themselves, believe that since all people embody the same divine spark all people deserve equal and fair treatment.
Friends were some of the first to value women as spiritual ministers. Elizabeth Hooton was possibly the first person to be convinced by George Fox and was an outspoken and daring preacher during the earliest days of the movement. Margaret Fell was another early leader of the Friends movement. The first two people who went to what is now the United States to promote the Quaker Faith were Mary Fisher and Ann Austin.
At one time it was common for male and female Quakers to have separate Meetings for Business. This practice was considered to give the women more power and was not meant to demean them. During the 1700s, some Quakers felt that women were not participating fully in Meetings for Business as most women would not "nay-say" their husbands. The solution was to form the two separate Meetings for Business. Many Quaker meeting houses were built with a movable divider down the middle. During Meetings for Worship, the divider was raised. During Business meetings the divider was lowered, creating two rooms. Each gender ran their own separate business meetings. Any issue which required the consent of the whole meeting—building repairs for example—would involve sending an emissary to the other meeting. This practice continued until there was no longer a concern over whether women would "nay-say" their husbands; some very old meetinghouses still have this divider, although it likely is nonmovable.
In addition, many of the leaders in the women's suffrage movement in the United States in the 19th century were drawn from the Quakers, including Susan B. Anthony and Lucretia Mott.
In 1776, the Philadelphia Yearly Meeting (the most important yearly meeting in USA at the time) prohibited members from owning slaves, and on February 11, 1790, Friends petitioned the U.S. Congress for the abolition of slavery. American Friends were prominent participants in the Underground Railroad, a transportation network for sending escaped slaves to freedom.
In the 1960s a Friend named Eric Baker took part in the founding of Amnesty International, a human rights group primarily focused on the treatment of those in prison and those accused of crimes. It is not directly connected with the Religious Society of Friends but has similar ideals as those derived from the Testimony of Equality.