In introducing the present issue, I clarify in which sense knowledge and philosophy can discriminate and marginalize some individuals. In the first part, I focus on the traditional exclusion of women from philosophy and explore some feminist projects of re-reading the philosophical canon. In my analysis, I pay particular attention to the gender gap in philosophy and the so-called “demographic problem” in academia. In the second part, I examine the best practices for remedying these forms of injustice and promoting diversity in philosophy.