This essay examines Kant's idea of organic teleology. The first two sections are devoted to Kant's analysis and justification of teleological conceptions in biology. Both the idea of teleology and Kant's anti-reductionism are derived from basic elements of his ‘critical’ treatment of the human intellect. The third section discusses the limitations Kant places on accounts of origins in the life world. It is argued that the limitations Kant places on accounts of the origins of species do not follow from his idea of teleology. The final section briefly outlines the fate of the Kantian formulation of teleology in the nineteenth century.