In this article we examine Kant’s understanding of toleration by including a study of all instances in which he directly uses the language of toleration and related concepts. We use this study to resolve several key areas of interpretative dispute concerning Kant’s views on toleration. We argue that Kant offers a nuanced and largely unappreciated approach to thinking about toleration, and related concepts, across three normative spheres: the political, the interpersonal and the personal. We examine shortcomings in earlier interpretations and conclude by arguing that the theme of toleration in Kant’s work, while coherent and important, is neither as central nor as peripheral as suggested by previous interpretations. Further, while Kant is critical of the arrogance of toleration in the political sphere, he is more positive toward the role of toleration in the interpersonal and personal spheres since it promotes virtue.

Kant’s discussion of the highest good is subject to continuous disagreement between the proponents of two interpretations of this concept. According to the secular interpretation, Kant conceived of the highest good as a political ideal which can be realized through human agency alone, albeit only from the Critique of the Power of Judgement onwards. By way of contrast, proponents of the theological interpretation find Kant’s treatment of the highest good in his later works to be wholly coherent with the discussions of this concept found in the second Critique. In their view, however, Kant never conceived of the highest good as a political ideal, and some go as far as to argue that it is the work of God alone. In this article, I defend a theologico-political account of the highest good that avoids the pitfalls of both readings.

The so-called ‘possibility proof’ in Kant's pre-Critical Beweisgrund has been widely discussed in the literature, and it is a common view that he never really abandoned it. As I shall argue, this reading is mistaken. I aim to show that the natural illusion in the Critique of Pure Reason, which is usually taken to be the possibility proof turned into a transcendental illusion, has both a different conclusion and a different argument than the possibility proof. Rather, what remains from Beweisgrund is what I will call the ‘proof a posteriori’, which the Critique turns into a transcendental illusion that is of regulative use for reason.

An influential interpretation of Kant’s Doctrine of Right suggests that the relationship between public right and freedom is constitutive rather than instrumental. The focus has been on domestic right and members’ relations to their own state. This has resulted in a statist bias which has not adequately dealt with the fact that Kant regards public right as a system composed of three levels – domestic, international and cosmopolitan right. This article suggests that the constitutive relationship is between all levels of right, on the one hand, and ‘freedom in the external relation’ of all human beings, on the other hand.

Marcus Willaschek’s new book Kant on the Sources of Metaphysics: The Dialectic of Pure Reason (Cambridge University Press, 2018) is a penetrating analysis of the Transcendental Dialectic of Kant’s Critique of Pure Reason. In his comments, the author first raises some questions concerning the structure of the Transcendental Dialectic (and Willaschek’s reconstruction of it) and then proposes that looking at the second Critique and continuing on into the third Critique will reveal more roles for the idea of God in Kant’s reconstruction of traditional metaphysics than Willaschek’s treatment suggests.

After providing a brief overview of Marcus Willaschek's Kant on the Sources of Metaphysics, I critically reconstruct his account of ‘transcendental realism’ and the role that it plays in the dramatic narrative of the Critique of Pure Reason. I then lay out in detail how Willaschek generates and evaluates various versions of transcendental realism and raise some concerns about each. Next, I look at precisely how Willaschek's Kant thinks we can avoid applying the ‘supreme’ dialectical principle (for every conditioned there is a totality of conditions which is unconditioned) to the domain of appearances. Finally, I call into question Willaschek's efforts to appropriate the lessons of the Transcendental Dialectic without following Kant into transcendental idealism.