 The controversy grew intense, leading D’Alembert to resign as editor, putting Diderot in sole control of the project. The final blow against the Encyclopédie occurred in July 1758 when Claude-Adrien Helvétius published On the Mind (De l’Esprit), one of the most overtly materialist and heterodox works of the French Enlightenment. Although Helvétius was not technically an encyclopédiste, he certainly moved in the same circles, and his work fit comfortably with the imaginary template of subversive materialist philosophie that crystallized after the Damiens Affair. Accordingly, as the officials in charge of securing public order, morality, and the book trade—the three were one in absolutist France—began to crack down on Helvétius and De l’Esprit, the Encyclopédie found itself pulled into the courts as a supposed accomplice aiding and abetting its crimes.