This list of books are ONLY the books that have been ranked on the lists that are aggregated on this site. This is not a comprehensive list of all books by this author.

1. 1. Critique of Pure Reason

   

   This philosophical work delves into the nature and limits of human knowledge, proposing that while our knowledge begins with experience, it doesn't necessarily arise out of experience. The author argues that pure reason itself has the ability to contribute to our knowledge and understanding of the universe. He further explores the concept of metaphysics, asserting that while it is possible, it is also severely limited by the human mind's ability to comprehend it.

   The 458th Greatest Book of All Time

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2. 2. Perpetual Peace

   A Philosophical Sketch

   

   The book outlines a philosophical framework for achieving lasting global peace through the establishment of a federation of free states governed by the rule of law and mutual respect. It argues that true peace is attainable only when nations adopt republican constitutions, respect human rights, and engage in transparent, cooperative international relations. The author emphasizes the importance of moral principles in politics and proposes practical steps, such as disarmament and the abolition of standing armies, to prevent war and promote harmony among nations.

   The 2642nd Greatest Book of All Time

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3. 3. The Critique Of Aesthetic Judgement

   Critique of Judgment

   

   This philosophical work delves into the nature and foundation of aesthetic experience, exploring how individuals perceive and judge beauty and art. It examines the interplay between subjective feelings and universal principles, proposing that aesthetic judgments are both personal and communicable. The text introduces the concept of "disinterested pleasure," suggesting that true appreciation of beauty is free from personal desires or practical concerns. It also discusses the role of imagination and understanding in forming aesthetic judgments, ultimately seeking to bridge the gap between the realms of nature and freedom.

   The 16557th Greatest Book of All Time

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4. 4. Groundwork Of The Metaphysics Of Morals

   

   Groundwork of the Metaphysics of Morals (1785; German: Grundlegung zur Metaphysik der Sitten; also known as the Foundations of the Metaphysics of Morals, Grounding of the Metaphysics of Morals, and the Grounding for the Metaphysics of Morals) is the first of Immanuel Kant's mature works on moral philosophy and the first of his trilogy of major works on ethics alongside the Critique of Practical Reason and The Metaphysics of Morals. It remains one of the most influential in the field. Kant conceives his investigation as a work of foundational ethics—one that clears the ground for future research by explaining the core concepts and principles of moral theory, and showing that they are normative for rational agents. Kant proposes to lay bare the fundamental principle of morality and show that it applies to us. Central to the work is the role of what Kant refers to as the categorical imperative, which states that one must act only according to maxims which one could will to become a universal law. Kant argues that the rightness of an action is determined by the principle that a person chooses to act upon. This stands in stark contrast to the moral sense theories and teleological moral theories that dominated moral philosophy at the time of Kant's career. The Groundwork is broken into a preface, followed by three sections. Kant begins from common-sense moral reason and shows by analysis the supreme moral law that must be its principle. He then argues that the supreme moral law in fact obligates us. The book is famously difficult, and it is partly because of this that Kant later, in 1788, decided to publish the Critique of Practical Reason.

   The 16744th Greatest Book of All Time

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5. 5. A Prolegomena To Any Future Metaphysics

   

   This concise philosophical primer argues that genuine metaphysics is possible only by clarifying how synthetic a priori knowledge arises, distinguishing the roles of sensibility (space and time) and understanding (the categories) in structuring experience. It maintains that we can know only appearances shaped by our cognitive faculties, while things-in-themselves remain inaccessible, thereby placing strict limits on speculative reason. Reconciling insights from rationalism and empiricism, it explains how metaphysical judgments can achieve scientific rigor within the bounds of possible experience. Serving as a roadmap to a critical methodology, it sets secure principles for any future metaphysical inquiry.

   The 17117th Greatest Book of All Time

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6. 6. Observations On The Feeling Of The Beautiful And Sublime

   

   The book explores the complex interplay between the concepts of beauty and sublimity, examining how these aesthetic experiences influence human emotions and moral judgments. It delves into the subjective nature of these feelings, proposing that beauty evokes a sense of harmony and pleasure, while the sublime inspires awe and respect through its vastness and power. The work also considers the cultural and gender differences in perceiving beauty and the sublime, suggesting that these experiences are deeply intertwined with personal and societal values. Through this analysis, the book lays the groundwork for understanding aesthetic appreciation as a significant aspect of human experience.

7. 7. An Answer To The Question

   What is Enlightenment?

   

   In this seminal essay, the author explores the concept of enlightenment, defining it as humanity's emergence from self-imposed immaturity, characterized by the inability to use one's understanding without guidance from another. The work emphasizes the importance of courage and freedom in the pursuit of knowledge, urging individuals to think independently and question established norms. It advocates for a society where free thought is encouraged, suggesting that this intellectual liberation is essential for progress and the betterment of humanity. The essay underscores the role of public discourse and the responsibility of individuals to contribute to the enlightenment process.

8. 8. Perpetual Peace And Other Essays

   A Philosophical Essay

   

   This collection of essays delves into the philosophical underpinnings of achieving lasting peace among nations, emphasizing the importance of republican constitutions, international cooperation, and the rule of law. It explores the moral imperatives and practical measures necessary for establishing a peaceful global order, advocating for a federation of free states bound by mutual respect and shared principles. Through a critical examination of human nature and political structures, the essays propose a vision of peace that transcends mere absence of war, aiming for a harmonious coexistence rooted in justice and equality.

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9. 9. Critique Of Judgement

   The Critique of the Power of Judgment

   

   This philosophical work delves into the intricate relationship between aesthetics and the human capacity for judgment, exploring how beauty and the sublime are perceived and appreciated. It bridges the gap between the realms of nature and freedom, examining how our aesthetic experiences influence our moral and cognitive faculties. By dissecting the nature of taste, the text seeks to understand how subjective experiences can hold universal significance, ultimately proposing that the power of judgment plays a crucial role in harmonizing the empirical world with the realm of ideas.

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10. 10. A Metafísica Dos Costumes

    Fundamentação da Metafísica dos Costumes

    

    This philosophical work delves into the foundational principles of moral philosophy, exploring the nature of human duty and the concept of the categorical imperative. It argues that moral actions are not determined by their consequences but by the adherence to universal maxims that respect the autonomy and rationality of individuals. The text emphasizes the importance of acting out of duty rather than inclination, proposing that true morality stems from a sense of obligation rooted in reason and the inherent dignity of all rational beings.

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11. 11. Prolegomena To Any Future Metaphysics That Will Be Able To Come Forward As Science

    That Will Be Able To Come Forward As Science

    

    This philosophical work serves as a foundational text that seeks to establish the possibility of metaphysics as a rigorous science. It addresses the limitations and capabilities of human reason, emphasizing the need for critical examination of our cognitive faculties. By distinguishing between phenomena (the world as we experience it) and noumena (the world as it is in itself), the text argues for a framework where metaphysical inquiry is grounded in the conditions of human experience. It challenges traditional metaphysical assumptions and sets the stage for a systematic approach to understanding the nature of reality and knowledge.

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12. 12. Introduction To Logic

    Ein Handbuch zu Vorlesungen

    

    A concise exposition of the formal rules of thought, presenting pure general logic as a content-free, a priori discipline that governs correct reasoning. It distinguishes concepts, judgments, and inferences, explains their roles in cognition, and surveys traditional syllogistic structures and the doctrine of method. Emphasizing that logic is a canon for evaluating thinking rather than an organon for extending knowledge, it also contrasts general logic with a transcendental inquiry into the conditions of possible experience.

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13. 13. First Introduction To The Critique Of Judgment

    

    This preliminary exposition develops the concept of reflective judgment as the faculty that mediates between understanding and reason by adopting the purposiveness of nature as a merely regulative principle. It explains how judgments of beauty claim a universal communicability of feeling without determinate concepts, and how teleological reflection views organisms as if ordered to ends, while denying constitutive knowledge of supersensible causes. By distinguishing determinative from reflective judgment and arguing for the necessity of systematic unity in scientific inquiry, it prepares the ground for a critique of aesthetic and teleological judgment that seeks to reconcile nature and freedom within a single critical framework.

14. 14. Metaphysical Foundations Of Natural Science

    

    Presents a systematic attempt to ground the basic concepts and laws of classical physics in a priori conditions of cognition, explaining how space, time, and the categories of the understanding make possible a “pure” part of natural science. Organized into phoronomy, dynamics, mechanics, and phenomenology, it analyzes motion, forces of attraction and repulsion, and the lawful behavior of matter to show how mathematics can necessarily apply to nature. By deriving the form and necessity of physical laws from the conditions of possible experience, it aims to reconcile empirical investigation with metaphysical justification.

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15. 15. The Critique Of Practical Reason

    

    A foundational defense of moral philosophy arguing that practical reason, not contingent desires, grounds a universal moral law expressed as the categorical imperative; it emphasizes the autonomy and duty of rational agents, insists that freedom is a necessary presupposition of moral responsibility, and introduces postulates (such as God and the immortality of the soul) as practical necessities for realizing the highest good, while distinguishing the limits and authority of practical versus theoretical reason.

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16. 16. Immanuel Kant's Kritik Der Praktischen Vernunft

    

    A systematic account of morality grounded in practical reason that argues the only intrinsically good thing is a good will acting from duty under the categorical imperative; moral obligations are derived from autonomy and respect for the moral law rather than from inclinations or consequences. It defends freedom as a necessary postulate for moral responsibility and introduces practical postulates—freedom, immortality, and God—as rational necessities for conceiving the highest good, where virtue and happiness can be reconciled. The work distinguishes pure practical reason from empirical motives and explains how the moral law issues universal, unconditional commands that confer dignity on rational agents.

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17. 17. Kritik Der Praktischen Vernunft. Grundlegung Zur Metaphysik Der Sitten

    

    A philosophical defense of morality that locates moral authority in practical reason and the good will, claiming that the only unconditionally good thing is a will that acts from duty; it formulates the categorical imperative as the supreme formal principle of ethics—requiring that one act only on maxims that could be willed as universal law and that persons be treated as ends in themselves—and argues that moral obligation arises from autonomy rather than consequences, while also introducing practical postulates (freedom, the immortality of the soul, and a moral order beyond empirical life) needed to make sense of moral responsibility and the pursuit of the highest good.

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18. 18. Käytännöllisen Järjen Kritiikki

    

    The work develops a moral philosophy holding that practical reason alone grounds the binding moral law: agents must act from duty in accordance with the categorical imperative, treating maxims as if they were universal laws. It defends human autonomy and freedom as necessary presuppositions of morality and introduces the postulates of practical reason—freedom, immortality, and God—as required to reconcile virtue with the highest good, while distinguishing practical from theoretical reason by arguing that moral, not speculative, concern justifies these postulates.