Introduction Michael Hauskeller and Lewis Coyne; 1. What is moral enhancement? Mark Rowlands; 2. The trouble with moral enhancement Inmaculada de Melo-Martín; 3. The sins of moral enhancement discourse Harris Wiseman; 4. Moral enhancement as a collective action problem Walter Glannon; 5. Would Aristotle have seen the wrongness of slavery if he had undergone a course of moral enhancement? Nigel Pleasants; 6. Moral enhancement and the human condition Edward Skidelsky; 7. Kantian challenges for the bioenhancement of moral autonomy Anna Frammartino Wilks; 8. Enhancing care Teodora Manea; 9. Moral epistemic enhancement Norbert Paulo; 10. Biomedical moral enhancement in the face of moral particularism Peter Shiu-Hwa Tsu and Pei-Hua Huang; 11. Is moral enhancement a right, or a threat to rights? John Shook; 12. Moral enhancement and moral freedom: a critique of the Little Alex problem John Danaher; 13. Retributivism and the moral enhancement of criminals Elizabeth Shaw; 14. Lone wolf terrorists and the impotence of moral enhancement Valerie Gray Hardcastle; 15. Moral enhancement, instrumentalism, and integrative ethical education Giuseppe Turchi; 16. The experimental psychology of moral enhancement Sylvia Terbeck and Kathryn Francis; 17. Drugs and hugs: stimulating moral dispositions as a method of moral enhancement Michał Klincewicz, Lily Frank and Marta Sokólska; 18. An unfit future: moral enhancement and technological harm Lewis Coyne; 19. Climate change and moral enhancement Aleksandra Kulawska and Michael Hauskeller; 20. Should we biochemically enhance sexual fidelity? Robbie Arrell; 21. Psychedelic moral enhancement Brian D. Earp.