In general in US academia, the numbers of women in the arts, social sciences, and the humanities are less than men but not too far from equality. The one exception is philosophy, where the number of women dip dramatically to the level of the sciences.
The reality is that the discipline of philosophy lags far behind other disciplines in the humanities in terms of number of women undergraduate philosophy majors, graduate students, and tenured faculty members. The best numbers indicate that women make up 21% of academic philosophers compared to humanities as a whole where women are 41% of academics. Our numbers are comparable to the physical sciences, where there has been more recent interest and intent to elevate the numbers. Women are 20.6% of academics in the physical sciences and 22.2% of the life sciences.
…Some of the problems diagnosed include the long history of professional male philosophers’ criticisms of women’s rational capacity (Marilyn Friedman), implicit bias and stereotype threat (Jennifer Saul), belief in meritocracy (Fiona Jenkins), difficulty in establishing credibility and authority (Katrina Hutchinson), problematic pedagogy (Catriona Mackenzie and Cynthia Townley), microinequalities (Samantha Brennan), and silencing (Justine McGill). Combine and compound the effects of all these practices, and one has very large systemic problems.