This essay experiments with Kant’s writings on rational religion distilled through the Strange Case of Dr Jekyll and Mr Hyde as canonical confrontations with primal problems of evil. It suggests boundaries between Stevenson’s characters and their occupations comparable to the those conflicted in the Kantian university, namely, law, medicine, theology, and philosophy (which makes a short anticipatory appearance in his earlier text on rational religion). With various faculties it investigates diffuse comprehensions—respectively, legal crime, biogenetic transmission, and original sin—of key ethical (...) modes: will, inheritance, incorporation, freedom, duty, obligation, love, living, and killing to conclude on the possible logic of evil (or evils of logic) collateral and possibly innate to Kant’s comprehension of radical evil. (shrink)