The Online Library of Liberty

A project of Liberty Fund, Inc.

• Foreword
• Acknowledgments
• Part I: Natural Rights
• Supplements and Observations
• Editorial Note
• Chapter 1: On Moral Philosophy, Or the Science of Natural Jurisprudence
• Chapter 2: On Lasting Happiness and the Divine Law 1
• Chapter 3: On Human Action In the Divine Court 1
• Chapter 4: Laws, Rights, and Justice 1
• Chapter 5: On Natural Law 1
• Chapter 6: On Duty to God 1
• Chapter 7: On Duty to Oneself 1
• Chapter 8: On Duty to Others, Or Sociability 1
• Chapter 9: Natural Rights and Agreements 1
• Chapter 10: On the Right of Property 1
• Chapter 11: Contracts and Quasi Contracts 1
• Chapter 12: Dissolution of Obligations 1
• Chapter 13: The State of Nature 1
• Chapter 14: On the Rights of Husbands and Wives 1
• Chapter 15: On the Rights of Parents and Children 1
• Chapter 16: On the Rights of Masters and Servants 1
• Chapter 17: On the Origin of Civil Society, Or the Original Contract 1
• Chapter 18: On the Constitution of Civil Government 1
• Chapter 19: On the Limits of Sovereign Power and the Right of Resistance 1
• Chapter 20: On Conquest and Patrimonial Kingdoms 1
• Chapter 21: On the Rights of Citizens 1
• Chapter 22: On the Rights of War and Peace 1
• Chapter 23: Appendix: the Rights and Duties of Men and Citizens In Which Concise Ethical Theses Are Succinctly Set Out In the Order Which Seems Most Natural For the Study of Moral Science 1
• Part II: Natural Theology
• Preface: Natural Theology and the Foundations of Morals
• On the Scope of Natural Theology
• Chapter 1: On the Existence of God
• Chapter 2: On the Attributes of God and First, On the Incommunicable Attributes
• Chapter 3: On the Communicable Attributes of God
• Chapter 4: On the Divine Operations, Or Actions Involving External Objects 1
• Part III: Logic
• Editorial Note
• Preface
• A Short Introduction to Logic
• Chapter 1: On Apprehension
• Chapter 2: On Judgment In General, and On Immediate Judgment In Particular
• Chapter 3: On Mediate Judgment Or Discourse
• Chapter 4: On Method, and Logical Practice
• Part IV: Early Writings: Philosophical Theses
• Philosophical Theses, 1699 On Directing the Mind to Lasting Happiness
• Philosophical Theses, 1707 On Natural Law: How Reverence For God Is Signified By Respect For Human Rights
• Part V: Gershom Carmichael’s Account of His Teaching Method

A Short Introduction to Logic

Logic is the science which exhibits the method of discovering truth and of expounding it to others. Since we can be said to attain truth or deviate from it, strictly speaking, only by the act of judging, it is clear that the purpose of teaching it is the formation of true and, so far as possible, certain judgments about things which everyone should learn. Now forming judgments about things requires a prior apprehension of them; and both the truth and the certainty of the judgment depend in no small degree on the correctness of the apprehension. There are therefore just two modes of thinking which require the particular direction of logic, i.e., apprehension and judgment.