Introduction; intro1 Preliminary; Part 1 Part I; Chapter 1 Of Positivity in Philosophy; Chapter 2 Of the Comparative Method; Chapter 3 The Positive Notion of Analogy; Chapter 4 The Positive Conception of Environment; Conclusion; Part 2 Part II; Chapter 6 First Example: A Comparative Chronology of Philosophy; Chapter 7 Second Example: Comparative Logic; Chapter 8 Third Example: Comparative Metaphysics; Chapter 9 Fourth Example: Comparative Psychology; conclusion1 Conclusion;