Task: Text Categorization
Input (English): He expounded his views on agapasm, synechism, and tychism in a series of articles published in The Monist that included "Man's Glassy Essence". In "Some Consequences of Four Incapacities" he argued against Cartesian skepticism, though his best known articles appeared in the Popular Science Monthly starting in 1877 and included "The Fixation of Belief" and "How to Make Our Ideas Clear". FTP, name this American philosopher, a pioneer of semiotics who founded the philosophical movement known as pragmatism.
Output (English): Social Science