This research paper investigates the perennial tension between the causal closure of the physical world—as suggested by modern neuroscientific advancements—and the fundamental human requirement for moral responsibility. While physical determinism challenges the traditional notion of “alternative possibilities,” this study argues that moral accountability remains an indispensable functional necessity for maintaining social order, interpersonal relationships, and legal systems. Through a conceptual and normative analysis, the paper examines key philosophical contributions, including Immanuel Kant’s framework of autonomy, Harry Frankfurt’s challenges to the Principle of Alternate Possibilities, and P.F. Strawson’s defense of reactive attitudes. It addresses the neuroethical implications of experiments initiated by Benjamin Libet, which suggest that subconscious processes precede conscious intention. The analysis demonstrates that a “strong,” metaphysical definition of free will is scientifically contentious; a compatibilist model—one that prioritizes the quality of an agent’s intentions and character—provides a more coherent basis for responsibility. By framing moral accountability as an essential social construct rather than an ontological mystery, the paper advocates for a shift toward rehabilitative justice models. Ultimately, this research concludes that acknowledging the complex interplay between deterministic biological factors and human deliberation allows for a robust, practical, and more humane understanding of agency in contemporary society.