This dissertation takes up the question of the social function of philosophy. Popular accounts of the nature and value of philosophy reinforce long-standing perceptions that philosophy is useless or irrelevant to pressing societal problems. Yet, the increasingly neoliberal political-economic environment of higher education places a premium on mechanisms that link public funding for research to demonstrations of return on investment in the form of benefitting broader society. This institutional situation presents a philosophical problem warranting professional attention. This project offers a diagnosis of the problem and develops a way forward from it. Drawing from Foucauldian archaeological methods, my analysis focuses on the interplay of institutional structures and intellectual practices. Since the early 20th century, departments of philosophy on college and university campuses have been the center of gravity for professional philosophy in the US. Establishing this institutional ‘home' for philosophers drove the adoption of disciplinary practices, norms, and standards for inquiry. But the metaphilosophical assumptions underpinning disciplinarity have become problematic, I argue: they are poor guides for navigating the situation of higher education in the 21st century. Several movements within the profession of philosophy during the 1960s and 70s sought to reverse philosophers' general retreat from public affairs. Applied philosophy, environmental philosophy, and bioethics each offer a case study in attempts to address the problem of societal relevance. However, surveys of the journal literature in each field uncovered few reflections on whether or not individual projects, or the field as a whole, had any impact on the societal problems to which those philosophers turned their attention. This suggests a need for further thinking about implementation – how to institutionalize alternative practices of philosophy that do demonstrate societal relevance. By way of conclusion, I offer some of the necessary groundwork toward a philosophy of implementation, in the form of discussing significant questions and challenges confronting philosophers who aim for societal relevance both in principle and in practice.