stylistic:tone, quality:correction, structural:summarization
Criticisms

Utilitarianism was revised and expanded by Bentham's student John Stuart Mill, who sharply criticised Bentham's view of human nature, which failed to recognise conscience as a human motive. Mill considered Bentham's view "to have done and to be doing very serious evil." In Mill's hands, "Benthamism" became a major element in the liberal conception of state policy objectives.

Bentham's critics have claimed that he undermined the foundation of a free society by rejecting natural rights. Historian Gertrude Himmelfarb wrote "The principle of the greatest happiness of the greatest number was as inimical to the idea of liberty as to the idea of rights."

Bentham's "hedonistic" theory (a term from J. J. C. Smart) is often criticised for lacking a principle of fairness embodied in a conception of justice. In Bentham and the Common Law Tradition, Gerald J. Postema states: "No moral concept suffers more at Bentham's hand than the concept of justice. There is no sustained, mature analysis of the notion." Thus, some critics object, it would be acceptable to torture one person if this would produce an amount of happiness in other people outweighing the unhappiness of the tortured individual. However, as P. J. Kelly argued in Utilitarianism and Distributive Justice: Jeremy Bentham and the Civil Law, Bentham had a theory of justice that prevented such consequences.