This innovative volume argues that flourishing is achieved when individuals successfully balance their responsiveness to three kinds of normative claim: self-fulfilment, moral responsibility, and intersubjective answerability. Applying underutilised resources in existential phenomenology, Irene McMullin reconceives practical reason, addresses traditional problems in virtue ethics, and analyses four virtues: justice, patience, modesty, and courage. Her central argument is that there is an irreducible normative plurality arising from the different practical perspectives we can adopt - the first-, second-, and third-person stances - which each present us with different kinds of normative claim. Flourishing is human excellence within each of these normative domains, achieved in such a way that success in one does not compromise success in another. The individual virtues are solutions to specific existential challenges we face in attempting to do so. This book will be important for anyone working in the fields of moral theory, existential phenomenology, and virtue ethics.