Mary Astell (1666-1731) was an unusually perceptive thinker and writer during the time of the Enlightenment. Here, author Christine Sutherland explores her importance as a rhetorician, an area that has, until recently, received little attention. Astell was widely known and respected during her own time, but her influence and reputation receded in the years after her death. Her significance as an Enlightenment thinker is becoming more and more recognized, however. As a skilled theorist and practitioner of rhetoric, Astell wrote extensively on education, philosophy, politics, religion, and the status of women. She showed that it was possible for a woman to move from the semi-private form of rhetoric represented by conversation and letters into full public participation in philosophy and political debate.