Part I: Expressionism in Philosophy: Spinoza; 1. Leibniz, Spinoza and the Anti-Cartesian Reaction; 2. Leibniz and Expression; Part II: Difference and Repetition and Logic of Sense; 3. Deleuze’s Critique of Representation; 4. A Leibnizian World; Part III: The Fold; 5. Material Folds and the Lower Level of the Baroque House; 6. Spiritual folds and the Upper Level of the Baroque House; Conclusion: The New Discord; Bibliography.