Hannah Arendt's 1929 dissertation published work already addresses fundamental figures of her thought: the concept of the world, existence, the vita socialis, and responsibility. Using the intersubjective theme par excellence, "love," Arendt discusses the diverse "duality" of humanity between isolation and community, not-yet and no-longer, habit and consciousness, in dialogue with and against Augustine. Arendt critically examines the foundations of Western ethical thought, focusing on an understanding of personhood, subjectivity, and love that remains of enduring interest.