This book offers a critical discussion of Sally Haslanger's philosophical oeuvre. Published on the occasion of the annual Münster Lectures in Philosophy held by Prof. Haslanger in the winter of 2019, it covers both her prominent work on the themes of gender, race, and ideology, as well as her research on social practices and social structures. Conceptual, methodological, practical as well as normative approaches are pursued to more closely understand Sally Haslanger's claims, arguments, and discursive goals. The direct correspondence between Sally Haslanger and her interlocutors makes this a very unique book suitable for both advanced scholars as well as graduate students.