摘要: In this paper I synthesize a unified system out of Peirce's life work, and name it “Peirce's Evolutionary Pragmatic Idealism”. Peirce developed philosophy in four stages: (I) His 1868–69 theory that cognition is continuous infinite social semiotic process, which Man sign. (II) His Popular Science Monthly pragmatism frequency probabilistic induction. (III) His 1891–93 cosmic evolutionism Tychism, Synechism, Agapism. (IV) Pragmaticism: The doctrine real potentialities (“would-be's”), pragmatic program for developing concrete reasonableness.