In contrast to Nussbaum’s narrow understanding of the capability approach, Robeyns (2017) argues that we can and should distinguish between, on the one hand, the capability approach as an underspecified and open-ended framework and, on the other hand, the capability approach as more specific capability theories. The capability approach should be defined as a normative framework, which can host a wide variety of more specific theories and applications, such as, for example, Nussbaum’s partial capability theory of justice, Crocker’s capability theory of deliberative democracy, and capabilitarian econometrics. Likewise, Qizilbash (2012) argues that the capability approach should be seen as a ‘thin’ framework, which can be filled in by ‘thicker’ theories and applications. While all of these accounts may differ greatly in their specific structure, purpose, and normative commitments, they all adhere to the same normative core, namely a normative commitment to conceptualize well-being in terms of capabilities and functionings.