This study of radical prophecy in 17th-century England explores the significance of gender for religious visionaries between 1650 and 1700. Phyllis Mack focuses on the Society of Friends, or Quakers, the largest radical sectarian group active during the English Civil War and Interregnum. The meeting records, correspondence, almanacs, autobiographical and religious writings left by the early Quakers enable Mack to present a textured portrait of their evolving spirituality. Parallel sources on men and women provide a unique opportunity to pose theoretical questions about the meaning of gender, such as whether a "women's spirituality" can be identified, or whether religious women are more or less emotional than men.