Kant scholars have paid relatively little attention to his raciology. They assume that his racism, as personal prejudice, can be disentangled from his core philosophy. They also assume that racism contradicts his moral theory. This book challenges both assumptions. It shows how Kant’s raciology—divided into racialism and racism—is integral to his philosophical system as a whole. It also rejects the individualistic approach to Kant and racism. Instead, it uses the notion of racism as ideological formation to demonstrate how Kant, from his social location both as a prominent scholar and as a lifelong educator, participated in the formation of modern racist ideology. As a scholar, Kant developed a groundbreaking scientific theory of race from the standpoint of a philosophical investigator of nature or Naturforscher. As an educator, he transmitted denigrating depictions of the racialized others and imbued them with normative relevance. In both roles, he presented a worldview that excluded nonwhites from such goods as recognitional respect and candidacy for cultural and moral achievements. Some effects of this worldview are still palpable today. Scholars who research and teach Kant’s philosophy therefore have an unshakable burden to take part in the ongoing antiracist struggles, through their teaching practices as well as their scholarship. And they must do so in a color-conscious as opposed to colorblind way, with a pragmatic attention to nonideal social realities and a clear normative orientation toward substantial racial justice, equality, and inclusion.