1. Leibniz's premisses; 2. Necessary propositions and the law of contradiction; 3. Contingent propositions and the law of sufficient reason; 4. The conception of substance; 5. The identity of indiscernibles and the law of continuity. Possibility and compossibility; 6. Why did Leibniz believe in an external world?; 7. The philosophy of matter: (a) as the outcome of the principles of dynamics; 8. The philosophy of matter (continued), (b) as explaining continuity and extension; 9. The labyrinth of the continuum; 10. The theory of space and time and its relation to monadism; 11. The nature of monads in general; 12. Soul and body; 13. Confused and unconscious perception; 14. Leibniz's theory of knowledge; 15. Proofs of the existence of God; 16. Leibniz's ethics; Appendix.