Reason and Revolution, Hegel and the Rise of Social Theory, Herbert Marcuse, London Routledge & Kegan Paul LTD 2nd edition 1941, reprinted 1955 - Herbert Marcuse

Can the human appropriation of nature ever achieve the elimination of violence, cruelty, and brutality in the daily sacrifice of animal life for the physical reproduction of the human race? To treat nature "for its own sake" sounds good, but it is certainly not for the sake of the animal to be eaten, nor probably for the sake of the plant. The end of this war, the perfect peace in the animal world — this idea belongs to the Orphic myth, not to any conceivable historical reality. In the face of the suffering inflicted by man on man, it seems terribly "premature" to campaign for universal vegetarianism or synthetic foodstuffs; as the world is, priority must be on human solidarity among human beings. And yet, no free society is imaginable which does not, under its "regulative idea of reason," make the concerted effort to reduce consistently the suffering which man imposes on the animal world.

We have reached the point where the Objective Logic turns into the Subjective Logic, or, where subjectivity emerges as the true form of objectivity. We may sum up Hegel’s analysis in the following schema: The true form of reality requires freedom. Freedom requires self-consciousness and knowledge of the truth. Self-consciousness and knowledge of the truth are the essentials of the subject. The form of reality must be conceived as subject. P. 154-155

Freed from the sublimated form which was the very token of its irreconcilable dreams—a form which is the style, the language in which the story is told—sexuality turns into a vehicle for the bestsellers of oppression. … This society turns everything it touches into a potential source of progress and of exploitation, of drudgery and satisfaction, of freedom and of oppression. Sexuality is no exception.