The Seven Systems of Metaphysics

Peirce's table of 7 systems of metaphysics

Peirce's table of 7 systems of metaphysics

Peirce’s lecture “The Seven Systems of Metaphysics,” 1903, was the fourth in a series which elaborated on his categories and his view of philosophy as a system, distancing it from other systems of his time. In previous lectures Peirce has defined and defended the three fundamental categories (firstness/quality, secondness/reaction, thirdness/representation), and here he endeavors to show the possible systems of metaphysics understood through the categories. The table, which appears in the text, shows what kind of metaphysical system results from admitting the reality of the different categories. The system that admits all 3 categories as Real and irreducible is the one Peirce is advancing, which he labels as a kind of Kantianism.

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