The fox knows many things, but the hedgehog knows one big thing. The Greek poet Archilochus formulated this sentence, and Isaiah Berlin made it famous with his essay on Tolstoy. But what is this "one big thing"? Ronald Dworkin provides an answer: it is values in all their forms. If we want to understand what truth and beauty are, what gives life meaning, what morality demands, and what justice requires, we must trace the path of those moral attitudes that permeate and shape human thought, feeling, and action into a unity. Justice for Hedgehogs is one of those books that are becoming increasingly rare in times of foxes - the specialists and skeptics: one that seeks to explain an entire world from a single principle while also providing guidance.