The paper investigates the 20th-century rediscovery of Yehudah Halevi's medieval philosophical novel, the Kuzari, through the lens of Martin Buber's dialogical and theo-political philosophy. Building upon Harry Wolfson's 1912 dichotomy—which cast Halevi as the quintessential "Hebraist" in contrast to Maimonides' "Hellenizing" rationalism—the study traces the Kuzari's transition from a historical defense of faith to a vital instrument for modern Jewish identity. Central to this analysis is the relationship between the People and the Land. Buber transcends Halevi's original biological-metaphysical concept of the "divine faculty" ('inyan ha-elohim) proposing instead a theo-political bond where the Land of Israel functions as the essential space for the emergence of a genuine community. In this framework, kingship is reinterpreted relationally: the God-King reigns not over a mass of subjects, but through a community founded on reciprocity and the "immediacy of relationships". Consequently, Buber sees the bond with the soil as a "sanctification of the concrete" rooted in the primal agrarian labor of Adam. In Buber's reading, Halevi was the first exilic thinker who articulated a vision grounded not in nostalgia for a "perfect time", but in the longing for a "perfect space". This spatial utopia, while embedded in the social and political sphere, entails the inner transformation of the individual through the liberation of relationships with the Other, nature, and the Absolute. By grounding spiritual renewal in the material world, Buber construes Halevi's Hebrew State as a "concrete utopia", a critical vantage point to interrogate the political reality of the emerging Israeli State.