Philosophy has the dubious distinction of attracting and retaining proportionally fewer women than any other field in the humanities, indeed, fewer than in all but the most resolutely male-dominated of the sciences. This short article introduces a thematic cluster that brings together five short essays that probe the reasons for and the effects of these patterns of exclusion, not just of women but of diverse peoples of all kinds in Philosophy. It summarizes some of the demographic measures of exclusion that (...) are cause for concern and identifies key themes that cross-cut these discussions: gender stereotypes and climate issues, ‘cognitive distortions’ and disciplinary norms. (shrink)