On Liberty on Système de politique positive: “M. Comte, in particular, whose social system, as unfolded in his Traité de Politique Positive, aims at establishing (though by moral more than by legal appliances) a despotism of society over the individual, surpassing anything contemplated in the political ideal of the most rigid disciplinarian among the ancient philosophers.”
Utilitarianism on Système de politique positive: “To any ethical student who finds the realization difficult, I recommend, as a means of facilitating it, the second of M. Comte's two principal works, the Systeme de Politique Positive. I entertain the strongest objections to the system of politics and morals set forth in that treatise;”