This book explores contributions by some of the most influential women in the history of philosophy, science, and literature. Ranging from Sappho and Sophie Germain to Stebbing and Evelyn Fox Keller, this work ultimately demonstrates the impact these non-canonical, sometimes unknown or hidden, sources had, or may have had, on the recognized male leaders in their fields, from Aristotle to Pascal, Kant, Whitehead, and Russell. Chapters reflect philosophical pluralism, both analytic and continental themes, and cover figures reaching across the entire history of ideas in the West, from pre-historic times to the twentieth century. Anyone interested in coming to know or in preparing to teach women in the history of philosophy, science, and literature will appreciate this collection and its myriad insights into the still unrecognized voices of non-canonical sources across these disciplines.