Although men have generally dominated philosophical discourse, women have been philosophers throughout the history of the discipline. Ancient examples include Maitreyi (1000 BCE), Gargi Vachaknavi (700 BCE), Hipparchia of Maroneia (active c. 325 BCE) and Arete of Cyrene (active 5th–4th centuries BCE). Some women philosophers were accepted during the medieval and modern eras, but none became part of the Western canon until the 20th and 21st century, when some sources indicate that Susanne Langer, G.E.M. Anscombe, Hannah Arendt and Simone de Beauvoir entered the canon.