 Civil and penal law are inextricably connected in Bentham’s legal theory. Just as the primary purpose of civil law is economic security and national prosperity, so it draws powerful support from the protection afforded persons, property and expectations by the threat of punishment (1838–43, III, 203). To this end, utilitarian penal law is framed in terms of the principal objective of deterrence, but it also embraces the secondary ends of disablement, moral reformation, and compensation (see Crimmins 2011). The effectiveness of the theory in practice depends on two additional features: offences must be classified solely on the basis of the harm perpetrated, and there must be an appropriate proportion between crimes and punishments. It is because of its failure to satisfy the first feature that Bentham (2014) rejected the prevailing criminalization of consensual sexual acts, and developed the first systematic defence of sexual liberty in the English language.