Charles S. Peirce's Philosophy of Signs examines Peirce's philosophy and semiotic thought from a European perspective, comparing the American's unique views with a wide variety of work by thinkers from the ancients to moderns. Parts I and II deal with the philosophical paradigms which are at the root of Peirce's new theory of signs, pragmatic and social. The main concepts analyzed are those of “sign” and “semiosis” and their respective trichotomies; formally in the case of “sign,” in time in the case of semiosis. Part III is devoted to comparing Peirce's theory of semiotics as a form of logic to the work of other philosophers, including Bertrand Russell, Wittgenstein, Frege, Philodemus, Lady Welby, Saussure, Morris, Jakobson, and Marshall McLuhan. Part IV deals with Peirce's “scientific metaphysics” in comparison with European metaphysics.