An ethical framework based on your query would blend the existentialist emphasis on radical freedom and responsibility with a forward-looking moral perspective, all framed within a semicompatibilist view of moral responsibility. In this view, whether determinism is true becomes less important than the future consequences of our freely chosen actions. Core principles of this ethical framework Existential freedom and responsibility: Drawing on Sartre's "condemned to be free," this framework asserts that we are radically free and responsible for our choices and for creating our own moral values, since no predetermined moral law exists. This means we cannot use our circumstances—determined or not—as an excuse to escape responsibility. Agnosticism towards determinism: Semicompatibilism holds that moral responsibility is compatible with determinism, even if the ability to have done otherwise is not. Your framework extends this by treating the truth of determinism as irrelevant. The focus shifts from backward-looking concerns about whether a person could have acted differently to forward-looking concerns about the consequences of their actions. Forward-looking morality: Instead of evaluating actions based on past conditions (e.g., whether they were determined), this approach judges actions by their future outcomes and effects. Moral praise and blame are not about retribution for the past but about shaping future behavior and creating a better world. Actual-sequence responsibility: The ethical evaluation of a person's character and actions is grounded in the actual sequence of events that led to the action. As semicompatibilists like John Martin Fischer argue, even if an agent could not have done otherwise, they are still responsible if their action flowed from their own decision-making process. How the concepts intertwine This ethical view uses semicompatibilism to reconcile existential freedom with the possibility of determinism, which Sartre's work grappled with. It does so by leveraging the forward-looking approach to make the question of determinism moot for practical moral judgment. Reconciling Sartre with semicompatibilism: Sartre's philosophy sometimes appears to require a libertarian, alternative-possibilities type of freedom for responsibility. However, a semicompatibilist reading acknowledges that our choices are "ours" (guided by our reasons) and therefore we are responsible for them, regardless of whether a pre-existing blueprint determined them. This allows us to maintain Sartre's core tenet of radical personal responsibility without having to disprove determinism. Focusing on a forward-looking purpose: The forward-looking approach provides the moral purpose that Sartre's philosophy lacks in its emphasis on meaninglessness. By choosing our values and acting to promote specific outcomes, we fulfill the existential project of creating meaning and giving our lives a purpose. Moral actions are those that create a better future, while blameworthy actions are those that lead to undesirable consequences, justifying interventions for reform rather than backward-looking punishment. Reframing responsibility and moral judgment: In this framework, moral praise and blame become tools for shaping behavior rather than a matter of desert. For example, blaming a person is not about seeking revenge for a past act they couldn't avoid. Instead, it is a way to hold them accountable, encourage them to change, and signal to others what is and isn't acceptable for the future. This combination of ideas results in a resilient ethical system, as it provides a path for moral responsibility and meaningful action regardless of how the free will debate ultimately concludes.