The long nineteenth-century--the period beginning with the French Revolution and ending with World War I--was a transformative period for women philosophers in German-speaking countries and contexts. The period spans romanticism and idealism, socialism, Nietzscheanism, and phenomenology, philosophical movements we most often associate with Hegel, Schopenhauer, Kierkegaard, Nietzsche, and Marx--but rarely with women. Yet women philosophers not only contributed to these movements, but also spearheaded debates about their social and political implications. While today their works are less well-known than those of their male contemporaries, many of these women philosophers were widely-read and influential in their own time. Their contributions shed important new light on nineteenth-century philosophy and philosophy more generally: revealing the extent to which various movements which we consider distinct were joined, and demonstrating the degree to which philosophy can transform lives and