What was Angelina and Sarah Grimkes contribution to the abolitionist movement?

The Grimke sisters were Quakers who were known to have a belief of equality between the races and the sexes. After moving to Pennsylvania, the sisters became active on the lecture circuit informing people about abolition but also fighting for women's rights. They brought the two ideas of the two movements together initiating the idea that all people in the US should be granted the rights of citizenship and freedom. These women were the first females to lecture publicly in addition to writing articles for abolitionist newspapers. They were able to propel the abolitionist movement forward and incorporate female reformers into the movement. Additionally they worked on beginning the feminist movement leading to the 1848 Seneca Falls Convention held by Elizabeth Cady Stanton.