 Given the diversity of fundamental principles to which socialists commonly appeal, it is perhaps unsurprising that few attempts have been made to link these principles under a unified framework. A suggested strategy has been to articulate some aspects of them as requirements flowing from what we might call the Abilities / Needs Principle, following Marx’s famous dictum, in The Critique of the Gotha Program, that a communist society should be organized so as to realize the goals of producing and distributing “From each according to [their] abilities, to each according to [their] needs”. This principle, presented with brevity and in the absence of much elaboration by Marx (Marx 1875 [1978b: 531]) has been interpreted in different ways. One, descriptive interpretation simply takes it to be a prediction of how people will feel motivated to act in a socialist society. Another, straightforwardly normative interpretation construes the Marxian dictum as stating duties to contribute to, and claims to benefit from, the social product—addressing the allocation of both the burdens and benefits of social cooperation. Its fulfillment would, in an egalitarian and solidaristic fashion, empower people to live flourishing lives (Carens 2003, Gilabert 2015). The normative principle itself has also been interpreted as an articulation of the broader, and more basic, idea of human dignity. Aiming at solidaristic empowerment, this idea could be understood as requiring that we support people in the pursuit of a flourishing life by not blocking, and by enabling, the development and exercise of their valuable capacities, which are at the basis of their moral status as agents with dignity (Gilabert 2017b).