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John Rawls's magnum opus, A Theory of Justice, is a sweeping rebuke of utilitarianism in all its forms, offering a Kant-inspired social contract theory in its stead.
I have also read Robert Nozick's Anarchy, State, and Utopia, a critique and counterproposal to Rawls, and am working on my own critique of Rawls's theory, on which I will expound at rawlsian.substack.com.
Websites johnlocketheumpteenth.com and rawlsian.org are for popularizing and critiquing Locke's Second Treatise on Government and John Rawls's A Theory of Justice, with a goal of relegating Jeremy Bentham's disastrous Utilitarianism to the dust-bin of Anglo-American legal theories.