Philosophical Papers and Letters

Walter von Tschirnhaus, 1678.- 20. On the Ethics of Benedict de Spinoza, 1678.- I. On God.- 21. What is an Idea? 1678.- 22. Letters to Nicolas Malebranche, 1679 (Selections).- 23. Two Dialogues on Religion, ca. 1678 (Selections).- I. Dialogue between Poliander and Theophile.- II. Dialogue between Polidore and Theophile.- 24. On the General Characteristic, ca. 1679.- 25. On Universal Synthesis and Analysis, or the Art of Disco very and Judgment, 1679(?).- 26. Two Studies in the Logical Calculus, 1679.- I. Elements of Calculus.- II. Specimen of Universal Calculus.- 27. Studies in a Geometry of Situation, 1679.- I. Letter to Christian Huygens, 1679.- II. Supplement.- III. On Analysis Situs.- 28. Letter to John Frederick, Duke of Brunswick-Hanover, 1679.- 29. On Freedom, ca. 1679.- 30. "First Truths", ca. 1680-84.- 31. Selections from Leibniz's Correspondence, 1679-84.- I. To Christian Philipp, 1679.- II. To Philipp, 1680.- III. To François de la Chaise, 1680.- IV. To Veit Ludwig von Seckendorf, 1683.- V. To Walter von Tschirnhaus, 1684.- 32. On the Elements of Natural Science, ca. 1682-84.- I. The Plan of the Book277 II. An Introduction on the Value and Method of Natural Science.- 33. Meditations on Knowledge, Truth, and Ideas, 1684.- 34. A Brief Demonstration of a Notable Error of Descartes and Others Concerning a Natural Law, 1686.- 35. "Discourse on Metaphysics", 1686.- 36. Correspondence with Arnauld, 1686-87 (Selections).- 37. Letter of Mr. Leibniz on a General Principle Useful in Explaining the Laws of Nature through a Considerationof the Divine Wisdom; to Serve as a Reply to the Response of the Rev. Father Malebranche, 1687.- to Parts III and IV.- III. Hanover to the Death of Ernest August, 1690-98.- 38. Letter to Arnauld, 1690.- 39. On the Method of Distinguishing Real from Imaginary Phenomena.- 40. On the True Theologia Mystica, ca. 1690(?).- 41. A Study in the Logical Calculus.- 42. Critical Thoughts on the General Part of the Principles of Descartes, 1692.- On Part I.- On Part II.- 43. Correspondence with Huygens, 1692-94 (Selections).- 44. From the Ethical and Legal Writings, 1693-1700.- I. From the Preface of the 'Codex Juris Gentium Diplomaticus'.- II. From the Preface to the Mantissa Codicis Juris Gentium.- III. On Wisdom.- IV. On Natural Law 428 A Classification of Societies or Communities.- 45. On the Correction of Metaphysics and the Concept of Substance, 1694.- 46. Specimen Dynamicum, 1695.- 47. I. A New System of the Nature and the Communication of Substances, as well as the Union between the Soul and the Body, 1695.- II. "Second Explanation of the New System", 1696.- 48. Letter to Gabriel Wagner on the Value of Logic, 1696.- 49. Letters to Des Billettes, 1696-97.- 50. Tentamen Anagogicum: An Anagogical Essay in the Investigation of Causes, ca. 1696.- 51. On the Radical Origination of Things, 1697.- 52. Clarification of the Difficulties which Mr. Bayle has found in the New System of the Union of Soul and Body, 1698.- 53. On Nature Itself, or on the Inherent Force and Actions of Created Things, 1698.- IV. Hanover under George Louis, 1698-1716.- 54. Correspondence with John Bernoulli, 1698-99.- 55. Correspondence with De Voider, 1699-1706.- 56. Letter to Varignon, with a Note on the 'Justification of the Infinitesimal Calculus by That of Ordinary Algebra',1702.- I. Letter to Varignon, February 2, 1702.- II. Justification of the Infinitesimal Calculus by That of Ordinary Algebra, 1701.- 57. On What is Independent of Sense and of Matter, 1702.- 58. Reflections on the Doctrine of a Single Universal Spirit, 1702.- 59. Reflections on the Common Concept of Justice, 1702(?).- 60. Reply to the Thoughts on the System of Pre-Established Harmony contained in the Second Edition of Mr. Bayle's Critical Dictionary, Article Rorarius 1702.- 61. Considerations on Vital Principles and Plastic Natures, by the Author of the System of Pre-Established Harmony, 1705.- 62. Letter to Hansch on the Platonic Philosophy or on Platonic Enthusiasm, 1707.- 63. Correspondence with Des Bosses, 1709-15.- 64. Conversation of Philarète and Ariste, following a Conversation of Ariste and Theodore, ca. 1711.- 65. Remarks on the three Volumes Entitled Characteristics of Men, Manners, Opinions, Times,... 1711, 1712.- 66. The Principles of Nature and of Grace, based on Reason, 1714.- 67. "The Monadology", 1714.- 68. Letters to Nicolas Remond, 1714-15.- 69. Letters to Louis Bourguet, 1714-15.- 70. The Metaphysical Foundations of Mathematics, after 1714.- 71. The Controversy between Leibniz and Clarke, 1715-16.