WorkImmanuel Kant

Einleitung in die Rechtslehre

Not a standalone book but the introduction to Kant's Doctrine of Right (1797), where he defines a right purely as the coexistence of free choices under one law.

by Immanuel Kant24 passages held

German, the original language

First published: 1797(aged 73)
Original language: German

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Overview

This is not a book but the opening section of one: the introduction to the Doctrine of Right, which Kant published in 1797 as the first half of his Metaphysics of Morals. Its work is definition, and everything political that follows depends on getting it exact. What is a right? Kant's answer strips away every appeal to happiness or welfare and leaves a formula about freedom alone: right is the whole set of conditions under which one person's free choice can coexist with everyone else's under a single universal law. From that he derives a claim the rest of the legal philosophy leans on — that a right and the authority to compel are one thing, because coercion used to block someone from blocking another's freedom is itself an exercise of freedom, not a violation of it. And he draws the line his whole ethics turns on: law asks only that your outward act conform, while virtue asks why you act, so the state may force what it can never make moral. There is one innate right, freedom, and every acquired right is built from it. The Doctrine of Right appeared garbled in its first printing, and Kant corrected and expanded it the following year; read today, this short introduction is where the modern liberal idea of law as the mutual limiting of freedom finds one of its clearest sources.

Key concepts

How does Kant define a right?

A right is the whole set of conditions under which one person's free choice can coexist with everyone else's under a single universal law. Every appeal to happiness, welfare or wellbeing is deliberately stripped out. Right concerns only the form in which free choices fit together — not how anyone fares, and not why they act, but whether their outer freedoms can stand side by side.

What is the single innate right, and how do acquired rights differ?

There is exactly one innate right — freedom, understood as independence from another's compelling choice — belonging to every person simply by their humanity. Every other right is acquired: property, contract, family standing, each built up from that innate freedom through further acts and relations. So the whole edifice of law rests, for Kant, on one original entitlement.

Is this Introduction a standalone book?

No — it is the framing section of the Doctrine of Right, the legal half of Kant's 1797 Metaphysics of Morals, and everything political that follows leans on the definitions it fixes here. The Doctrine of Right first appeared garbled in print, and Kant corrected and expanded it the following year; this short opening is where its key terms are set.

How do you tell whether a particular action is rightful?

By the universal principle of right: an action is rightful if it can coexist with everyone's freedom under a universal law, or if its maxim lets each person's free choice stand together with every other's. The test looks only at the outer act and its compatibility with others' freedom — never at the agent's inner motive, which is virtue's concern, not law's.

Themes of the book

What this book returns to, gathered into themes and ordered by how much of the text each one occupies.

Right as the Coexistence of Freedoms

Strip every appeal to happiness or welfare from the idea of a right — what single formula, resting on freedom alone, is left to build a whole law upon?

A right is the sum of the conditions under which one person's free choice can coexist with everyone else's under a single universal law. From that definition Kant derives the claim the rest of his legal philosophy leans on — that a right and the authority to compel are one thing, since coercion used to block another's blocking of freedom is itself an exercise of freedom, not a breach of it. And he draws the line his whole ethics turns on: law asks only that the outward act conform, while virtue asks why one acts, so the state may force what it can never make moral.

freedom
autonomy
coercion
equity
ethics and law
property
strict right

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Within this work

passages held: 24
distinct concepts: 57
by passages held, corpus-wide: #264

What this book thinks together

Every arc around the wheel is one concept in this book. A ribbon joins two the text reaches for together, and its width is how many of its passages hold both. Strongest: freedom with nature.

Concept co-occurrence, strongest first 8 concepts, joined by 9 pairings. 22 shared passages in all. 9 weaker pairings reach beyond these concepts and are not drawn.
Concept	Paired concept	Shared passages
freedom	nature	4
aesthetic judgment	reflective judgment	3
reflective judgment	teleology	3
aesthetic judgment	teleology	2
causality	freedom	2
causality	nature	2
causality	sensible	2
freedom	sensible	2
nature	sensible	2

Works held

The author's work in order, this book marked in place. Your-language title first, the original beneath it where the two differ; side chips show which full texts are held.

1764 Inquiry Concerning the Distinctness of the Principles of Natural Theology and Morality (Untersuchung über die Deutlichkeit der Grundsätze der natürlichen Theologie und der Moral)
Kant's runner-up entry in the Berlin Academy's prize contest, and the sharpest of the pre-critical essays: it already sets philosophy's method against mathematics', the problem the first Critique would finally resolve.
DE
1764 Observations on the Feeling of the Beautiful and Sublime (Beobachtungen über das Gefühl des Schönen und Erhabenen)
The popular essay of Kant's pre-critical years, twenty-six years before the Critique of Judgement gave taste a rigorous grounding; its remarks on race and sex now drive much of the scholarship on him.
DE
1766 Dreams of a Spirit-Seer, Elucidated by Dreams of Metaphysics (Träume eines Geistersehers, erläutert durch Träume der Metaphysik)
The anonymous, ironic book of 1766 in which Kant's faith in speculative metaphysics visibly collapses — the clearing of the ground that the first Critique, fifteen years later, would build on.
DE
1781 The Critique of Pure Reason (Kritik der reinen Vernunft)
The book at the centre of everything after it: the first of the three Critiques, revised almost past recognition for its 1787 second edition, and the work the Prolegomena was written to explain.
DEEN
1784 An Answer to the Question: What Is Enlightenment? (Beantwortung der Frage: Was ist Aufklärung?)
The most quoted thing Kant wrote, and among the shortest: a 1784 magazine answer to a question a Berlin pastor had left hanging, and the defining slogan of the German Enlightenment.
DE
1784 Idea for a Universal History with a Cosmopolitan Purpose (Idee zu einer allgemeinen Geschichte in weltbürgerlicher Absicht)
The essay where Kant first treats history as more than chronicle — nine propositions arguing it has a hidden rational shape; the seed of Perpetual Peace, and a device Hegel later took over.
DE
1785 Fundamental Principles of the Metaphysic of Morals (Grundlegung zur Metaphysik der Sitten)
The short, deliberately preliminary book that isolates the categorical imperative before building anything on it; three years later the Critique of Practical Reason would give the same moral law its fuller grounding.
DEEN
1786 What Does It Mean to Orient Oneself in Thinking? (Was heißt: sich im Denken orientieren?)
An intervention in the pantheism controversy that split the German Enlightenment: written months after Mendelssohn's death, it stakes out a rational faith between dogmatic proof and Jacobi's leap.
DE
1788 The Critique of Practical Reason (Kritik der praktischen Vernunft)
The second of the three Critiques, and Kant's reply to those who doubted the Groundwork's freedom; it introduces the fact of reason and the postulates of God and immortality.
DEEN
1793 Religion within the Boundaries of Mere Reason (Die Religion innerhalb der Grenzen der bloßen Vernunft)
The book that got Kant ordered to stop writing on religion: four essays, from 1793, rebuilding Christian doctrine on reason and consigning revelation and clergy to what Kant called counterfeit service.
DE
1795 Perpetual Peace: A Philosophical Sketch (Zum ewigen Frieden: Ein philosophischer Entwurf)
The late essay whose plan for a league of free states reached the twentieth century intact; Kant, past seventy, wrote it as Prussia pulled out of the war against revolutionary France.
DE
1797 Einleitung in die Rechtslehre you are here DE
1798 Von der Macht des Gemüts, durch den bloßen Vorsatz seiner krankhaften Gefühle Meister zu sein
The third part of Kant's late Conflict of the Faculties (1798), written as a reply to the physician Hufeland — a philosopher's dietetics, and his most personal page on governing the body through the mind.
DE
1803 Lectures on Pedagogy (Über Pädagogik)
One of the last books to appear under Kant's name (1803), though his editor Rink built it from lecture notes; the fullest record of Kant on education, and of his debt to Rousseau.
DE
Critique of Judgement
The book the Romantics and the German Idealists built on: Kant's 1790 account of beauty and of purpose in nature, written to bridge the gulf that had opened between his first two Critiques.
DEEN
Prolegomena to Any Future Metaphysics
Written to salvage the Critique of Pure Reason after its baffled reception, this shorter 1783 restatement runs the same argument in reverse, and became most readers' first encounter with Kant.
DEEN
The Metaphysical Elements of Ethics (Die Metaphysik der Sitten)
Long read as a mere appendix to the Groundwork, this ethical half of the 1797 Metaphysics of Morals is where Kant spells out the duties of virtue; later Kantians recovered it as his theory of character.
DEEN

— or open another of their works